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Can't launch fiddler.exe

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Telerek
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Telerek asked on 14 Jan 2017, 01:17 PM

From your website, I downloaded mono framework and fiddler-mac in SnowLeopard.

After installing mono and doing /Library/Frameworks/Mono.framework/Versions/4.6.2/bin/mozroots --import --sync, I extracted the zip file in the document folder. In terminal, cd to the folder and type mono Fiddler.exe, then following error occured:

exception inside UnhandledException handler: The type initializer for 'Fiddler.CONFIG' threw an exception.

[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Windows.Forms.WindowsFormsSynchronizationContext' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeEngine' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeWin32Classic' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.KnownColors' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.GDIPlus' threw an exception. ---> System.DllNotFoundException: /Library/Frameworks/Mono.framework/Versions/4.6.2/lib/libgdiplus.dylib
  at (wrapper managed-to-native) System.Drawing.GDIPlus:GdiplusStartup (ulong&,System.Drawing.GdiplusStartupInput&,System.Drawing.GdiplusStartupOutput&)
  at System.Drawing.GDIPlus..cctor () [0x000cc] in <1917aa1c39d94b1a91807b8cd9f03350>:0
   --- End of inner exception stack trace ---
  at System.Drawing.KnownColors..cctor () [0x0001a] in <1917aa1c39d94b1a91807b8cd9f03350>:0
   --- End of inner exception stack trace ---
  at System.Drawing.Color.get_AliceBlue () [0x00000] in <1917aa1c39d94b1a91807b8cd9f03350>:0
  at Fiddler.CONFIG..cctor () [0x00206] in <f7619d266c2c40b09be7fbc7f689415c>:0
   --- End of inner exception stack trace ---
  at System.Windows.Forms.ThemeVisualStyles..ctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.ThemeEngine..cctor () [0x0002d] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
   --- End of inner exception stack trace ---
  at System.Windows.Forms.SystemInformation.get_MenuAccessKeysUnderlined () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.Control..ctor () [0x000ea] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control:.ctor ()
  at System.Windows.Forms.WindowsFormsSynchronizationContext..cctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
   --- End of inner exception stack trace ---
  at System.Windows.Forms.Control..ctor () [0x00014] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.ScrollableControl..ctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.ContainerControl..ctor () [0x0000e] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.Form..ctor () [0x00012] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at ..SetStyle (System.Windows.Forms.ControlStyles flag, System.Boolean value) [0x00000] in <f7619d266c2c40b09be7fbc7f689415c>:0
  at (wrapper remoting-invoke-with-check) .:.ctor ()
  at Fiddler.frmViewer.‹• (System.String[] ˆ•) [0x0004a] in <f7619d266c2c40b09be7fbc7f689415c>:0
  at Fiddler.frmViewer.‡• (System.String[] ˆ•) [0x00016] in <f7619d266c2c40b09be7fbc7f689415c>:0

24 Answers, 1 is accepted

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Chris
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answered on 19 Jan 2017, 07:43 PM

I have the exact name issue where it crashes immediately after calling mono Fiddler.exe. I first tried in /Applications, then move the app to ~/Downloads. I'm running El Capitan (10.11.6).

 

Tsviatko, any ideas on how to resolve this?

 

Thanks.

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Tsviatko Yovtchev
Telerik team
answered on 23 Jan 2017, 05:47 PM
Hello,

Sorry about the late reply.

That is a pretty weird problem. Which version of Mono do you, guys, have installed? Chris, are you certain you get exactly the same error?

Regards,
Tsviatko Yovtchev
Telerik by Progress
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Chris
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answered on 23 Jan 2017, 05:59 PM

Here is my console output. I have Mono 4.6.2 installed.

 

C02FH2SSDF93:fiddler-mac chris$ mono Fiddler.exe
exception inside UnhandledException handler: The type initializer for 'Fiddler.CONFIG' threw an exception.
 
[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Windows.Forms.WindowsFormsSynchronizationContext' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeEngine' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeWin32Classic' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.KnownColors' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.GDIPlus' threw an exception. ---> System.DllNotFoundException: libgdiplus.dylib
  at (wrapper managed-to-native) System.Drawing.GDIPlus:GdiplusStartup (ulong&,System.Drawing.GdiplusStartupInput&,System.Drawing.GdiplusStartupOutput&)
  at System.Drawing.GDIPlus..cctor () <0x10a733a00 + 0x001d5> in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Drawing.KnownColors..cctor () <0x10a7338c0 + 0x00064> in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Drawing.Color.get_AliceBlue () <0x10f063990 + 0x0001e> in <filename unknown>:0
  at Fiddler.CONFIG..cctor () <0x10f0607a0 + 0x00610> in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Windows.Forms.ThemeVisualStyles..ctor () <0x10a733490 + 0x00014> in <filename unknown>:0
  at System.Windows.Forms.ThemeEngine..cctor () <0x10a733370 + 0x0008f> in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Windows.Forms.SystemInformation.get_MenuAccessKeysUnderlined () <0x10a732f40 + 0x00010> in <filename unknown>:0
  at System.Windows.Forms.Control..ctor () <0x10a7318a0 + 0x00274> in <filename unknown>:0
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control:.ctor ()
  at System.Windows.Forms.WindowsFormsSynchronizationContext..cctor () <0x10a732e30 + 0x00031> in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Windows.Forms.Control..ctor () <0x10a7318a0 + 0x0005e> in <filename unknown>:0
  at System.Windows.Forms.ScrollableControl..ctor () <0x10a731240 + 0x00017> in <filename unknown>:0
  at System.Windows.Forms.ContainerControl..ctor () <0x10a730fc0 + 0x0002d> in <filename unknown>:0
  at System.Windows.Forms.Form..ctor () <0x10a730630 + 0x000f9> in <filename unknown>:0
  at ..SetStyle (ControlStyles flag, Boolean value) <0x10a72e0f0 + 0x0002a> in <filename unknown>:0
  at (wrapper remoting-invoke-with-check) .:.ctor ()
  at Fiddler.frmViewer.‹• (System.String[] ˆ•) <0x10a726560 + 0x00117> in <filename unknown>:0
  at Fiddler.frmViewer.‡• (System.String[] ˆ•) <0x10a725dd0 + 0x0009b> in <filename unknown>
0
Tsviatko Yovtchev
Telerik team
answered on 24 Jan 2017, 04:09 PM
Hello,

Looks like your installation of Mono is not complete. libgdiplus.dylib seems to be missing. Please, make sure this library gets installed.

Regards,
Tsviatko Yovtchev
Telerik by Progress
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Sean McLellan
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answered on 01 Feb 2017, 02:51 PM

Getting the exact same exception. Using mono-4.6.2.16.

Mono is installed via Brew

brew info Mono
Mono: stable 4.6.2.16 (bottled)
Cross platform, open source .NET development framework
http://www.mono-project.com/
Conflicts with: czmq, xsd
/usr/local/Cellar/Mono/4.6.1.5 (1,603 files, 234.5M)
  Poured from bottle on 2016-11-07 at 11:34:56
/usr/local/Cellar/Mono/4.6.2.7 (1,603 files, 234.5M)
  Poured from bottle on 2016-12-14 at 16:17:15
/usr/local/Cellar/Mono/4.6.2.16 (1,603 files, 234.5M)
  Poured from bottle on 2017-02-01 at 09:33:06
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/mono.rb
==> Dependencies
Build: automake ✘, autoconf ✔, pkg-config ✔
==> Requirements
Build: git ✔
==> Options
--without-fsharp
Build without support for the F# language.

 

 

Exception:

WARNING: The Carbon driver has not been ported to 64bits, and very few parts of Windows.Forms will work properly, or at all
exception inside UnhandledException handler: The type initializer for 'Fiddler.CONFIG' threw an exception.

[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Windows.Forms.WindowsFormsSynchronizationContext' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeEngine' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeWin32Classic' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.KnownColors' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.GDIPlus' threw an exception. ---> System.DllNotFoundException: libgdiplus.dylib
  at (wrapper managed-to-native) System.Drawing.GDIPlus:GdiplusStartup (ulong&,System.Drawing.GdiplusStartupInput&,System.Drawing.GdiplusStartupOutput&)
  at System.Drawing.GDIPlus..cctor () [0x000cc] in <1917aa1c39d94b1a91807b8cd9f03350>:0
   --- End of inner exception stack trace ---
  at System.Drawing.KnownColors..cctor () [0x0001a] in <1917aa1c39d94b1a91807b8cd9f03350>:0
   --- End of inner exception stack trace ---
  at System.Drawing.Color.get_AliceBlue () [0x00000] in <1917aa1c39d94b1a91807b8cd9f03350>:0
  at Fiddler.CONFIG..cctor () [0x00206] in <f7619d266c2c40b09be7fbc7f689415c>:0
   --- End of inner exception stack trace ---
  at System.Windows.Forms.ThemeVisualStyles..ctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.ThemeEngine..cctor () [0x0002d] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
   --- End of inner exception stack trace ---
  at System.Windows.Forms.SystemInformation.get_MenuAccessKeysUnderlined () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.Control..ctor () [0x000ea] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control:.ctor ()
  at System.Windows.Forms.WindowsFormsSynchronizationContext..cctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
   --- End of inner exception stack trace ---
  at System.Windows.Forms.Control..ctor () [0x00014] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.ScrollableControl..ctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.ContainerControl..ctor () [0x0000e] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at System.Windows.Forms.Form..ctor () [0x00012] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0
  at ..SetStyle (System.Windows.Forms.ControlStyles flag, System.Boolean value) [0x00000] in <f7619d266c2c40b09be7fbc7f689415c>:0
  at (wrapper remoting-invoke-with-check) .:.ctor ()
  at Fiddler.frmViewer.‹• (System.String[] ˆ•) [0x0004a] in <f7619d266c2c40b09be7fbc7f689415c>:0
  at Fiddler.frmViewer.‡• (System.String[] ˆ•) [0x00016] in <f7619d266c2c40b09be7fbc7f689415c>:0

0
Tsviatko Yovtchev
Telerik team
answered on 02 Feb 2017, 06:40 PM
Well it looks like the brew installation really misses libgdiplus.dylib. It seems to be missing from other third-party installations, too. 

So, please, install the official Mono packages.

Regards,
Tsviatko Yovtchev
Telerik by Progress
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Sean McLellan
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answered on 03 Feb 2017, 11:20 AM
Gee willikers, batman! if only there were a way to build native cross-platform applications that have truly native UI that could even be published to the mac app store. 
0
Mour
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answered on 09 Feb 2017, 08:10 PM

Ran into the same issue after updating mono with brew:

 

[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Windows.Forms.WindowsFormsSynchronizationContext' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeEngine' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Windows.Forms.ThemeWin32Classic' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.KnownColors' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Drawing.GDIPlus' threw an exception. ---> System.DllNotFoundException: libgdiplus.dylib
  at (wrapper managed-to-native) System.Drawing.GDIPlus:GdiplusStartup (ulong&,System.Drawing.GdiplusStartupInput&,System.Drawing.GdiplusStartupOutput&)
  at System.Drawing.GDIPlus..cctor () [0x000cc] in <1917aa1c39d94b1a91807b8cd9f03350>:0 
   --- End of inner exception stack trace ---
  at System.Drawing.KnownColors..cctor () [0x0001a] in <1917aa1c39d94b1a91807b8cd9f03350>:0 
   --- End of inner exception stack trace ---
  at System.Drawing.Color.get_AliceBlue () [0x00000] in <1917aa1c39d94b1a91807b8cd9f03350>:0 
  at Fiddler.CONFIG..cctor () [0x00206] in <f7619d266c2c40b09be7fbc7f689415c>:0 
   --- End of inner exception stack trace ---
  at System.Windows.Forms.ThemeVisualStyles..ctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
  at System.Windows.Forms.ThemeEngine..cctor () [0x0002d] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
   --- End of inner exception stack trace ---
  at System.Windows.Forms.SystemInformation.get_MenuAccessKeysUnderlined () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
  at System.Windows.Forms.Control..ctor () [0x000ea] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control:.ctor ()
  at System.Windows.Forms.WindowsFormsSynchronizationContext..cctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
   --- End of inner exception stack trace ---
  at System.Windows.Forms.Control..ctor () [0x00014] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
  at System.Windows.Forms.ScrollableControl..ctor () [0x00000] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
  at System.Windows.Forms.ContainerControl..ctor () [0x0000e] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
  at System.Windows.Forms.Form..ctor () [0x00012] in <d5b72d15d4f7424c8a1538e3f19ec2e3>:0 
  at ..SetStyle (System.Windows.Forms.ControlStyles flag, System.Boolean value) [0x00000] in <f7619d266c2c40b09be7fbc7f689415c>:0 
  at (wrapper remoting-invoke-with-check) .:.ctor ()
  at Fiddler.frmViewer.‹• (System.String[] ˆ•) [0x0004a] in <f7619d266c2c40b09be7fbc7f689415c>:0 
  at Fiddler.frmViewer.‡• (System.String[] ˆ•) [0x00016] in <f7619d266c2c40b09be7fbc7f689415c>:0 
imacs-iMac-9:fiddler-mac _md$ 

Will check out the config file since it is saying something is wrong in there.

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Mour
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answered on 10 Feb 2017, 07:39 AM

Looks like the version 4.6.1.5 that brew installs does not have a libgdiplus.dylib file. I checked another version of mono on my machine (version 4.8) and I see the libgdiplus file. So, I ended with the following:

/Library/Frameworks/Mono.framework/Versions/4.8.0/bin/mono Fiddler.exe

since brew wouldn't install a RC version of Mono.

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Lee Wei
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answered on 24 Aug 2017, 04:53 PM

... and does it work now?

[quote]Mour said:

Looks like the version 4.6.1.5 that brew installs does not have a libgdiplus.dylib file. I checked another version of mono on my machine (version 4.8) and I see the libgdiplus file. So, I ended with the following:

/Library/Frameworks/Mono.framework/Versions/4.8.0/bin/mono Fiddler.exe

since brew wouldn't install a RC version of Mono.

[/quote]

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Govind
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answered on 18 Sep 2017, 12:46 PM

after downloading mono framework and fiddler when i am trying to run mono fiddler.exe its giving me below error and fiddler is aborting:

Process 44893 detached
(lldb) quit
Abort trap: 6

 

 

 

 

0
Alexander
Telerik team
answered on 19 Sep 2017, 08:05 AM
Hi Govind,

You have to pass --arch=32 to the mono command. This is needed because the 64-bit version of Mono does not support WinForms.

Regards,
Alexander
Progress Telerik
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Govind
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answered on 19 Sep 2017, 10:06 AM

Hi Alexander,

Thanks for your quick response.

Now i tried with mono fiddler.exe --arch=32 but getting below error:

Process 31268 detached
(lldb) quit
Abort trap: 6

could you please check this.

Thanks and Regards,

Govind Dubey 

 

 

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Alexander
Telerik team
answered on 19 Sep 2017, 11:15 AM
Hi,

The options should be passed before the actual file:

mono --arch=32 Fiddler.exe

Regards,
Alexander
Progress Telerik
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Prashant
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answered on 16 Oct 2017, 02:36 AM

Upon running the command i get the following error

Mozilla Roots Importer - version 5.2.0.0
Download and import trusted root certificates from Mozilla's MXR.
Copyright 2002, 2003 Motus Technologies. Copyright 2004-2008 Novell. BSD licensed.


WARNING: mozroots is deprecated, please move to cert-sync instead.


Downloading from 'https://hg.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt'...
Importing certificates into user store...
1 new root certificates were added to your trust store.
Import process completed.


prashants-MacBook-Pro:Versions prashant$ cd Documents
-bash: cd: Documents: No such file or directory
prashants-MacBook-Pro:Versions prashant$ cd
prashants-MacBook-Pro:~ prashant$ cd Documents
prashants-MacBook-Pro:Documents prashant$ ls
Albert bar.jpgSlide issue_windows 10fiddler-mac (2).zip
Export to xero error.harTest run_Issues.numbersfiddler-mac.zip
Final import.csvXero_tax setting.mp4kadmin.png
PURCHASE.webmcharles-proxy-4.1.4.dmgpurchase 2.webm
QA-training.numbersexporttest.csvstockcount.webm
Refund and print receipts_Discountfiddler-mactest4.12.csv
Screenshots of test runfiddler-mac (2)
prashants-MacBook-Pro:Documents prashant$ cd fiddler-mac(2)
-bash: syntax error near unexpected token `('
prashants-MacBook-Pro:Documents prashant$ cd fiddler-mac
prashants-MacBook-Pro:fiddler-mac prashant$ mono fiddler.exe
WARNING: The Carbon driver has not been ported to 64bits, and very few parts of Windows.Forms will work properly, or at all
Stacktrace:


  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Windows.Forms.XplatUICarbon.CGDisplayBounds (intptr) [0x00002] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.XplatUICarbon.get_WorkingArea () [0x00005] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.XplatUICarbon.get_VirtualScreen () [0x00000] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.XplatUI.get_VirtualScreen () [0x00000] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Screen..cctor () [0x00034] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001e] in <48b95f3df5804531818f80e28ec60191>:0
  at <unknown> <0xffffffff>
  at System.Windows.Forms.Form.get_CreateParams () [0x00157] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Control.CreateHandle () [0x0002a] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Form.CreateHandle () [0x00000] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Control.CreateControl () [0x00039] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Control.SetVisibleCore (bool) [0x0003a] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Form.SetVisibleCore (bool) [0x00065] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Control.set_Visible (bool) [0x00009] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at System.Windows.Forms.Control.Show () [0x00000] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control.Show () [0x00031] in <37dfd86a0d3248c0b8cd4af52ec71426>:0
  at Fiddler.frmViewer.‹• (string[]) [0x00081] in <09623c708fdb40a483cea147bbea7a7f>:0
  at Fiddler.frmViewer.‡• (string[]) [0x00016] in <09623c708fdb40a483cea147bbea7a7f>:0
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) [0x0004e] in <09623c708fdb40a483cea147bbea7a7f>:0


Native stacktrace:


0   mono                                0x0000000101349c91 mono_handle_native_crash + 257
1   mono                                0x00000001013afaf6 altstack_handle_and_restore + 70
2   SkyLight                            0x00007fff8e2b307f SLDisplayBounds + 50
3   ???                                 0x00000001059d975e 0x0 + 4389181278
4   ???                                 0x00000001017b941f 0x0 + 4319843359
5   mono                                0x00000001012a0135 mono_jit_runtime_invoke + 2245
6   mono                                0x00000001014a1948 do_runtime_invoke + 88
7   mono                                0x000000010149d8dd mono_runtime_class_init_full + 1021
8   mono                                0x0000000101299b2a mono_jit_compile_method_inner + 2442
9   mono                                0x000000010129c47a mono_jit_compile_method_with_opt + 714
10  mono                                0x000000010134c29f common_call_trampoline + 1199
11  mono                                0x000000010134bdb9 mono_magic_trampoline + 73
12  ???                                 0x000000010170139e 0x0 + 4319089566
13  ???                                 0x0000000104d8dfd5 0x0 + 4376289237
14  ???                                 0x0000000104b457b7 0x0 + 4373895095
15  ???                                 0x0000000104b45480 0x0 + 4373894272
16  ???                                 0x00000001017b900c 0x0 + 4319842316
17  mono                                0x00000001012a0135 mono_jit_runtime_invoke + 2245
18  mono                                0x00000001014a1948 do_runtime_invoke + 88
19  mono                                0x00000001014a4dbc do_exec_main_checked + 140
20  mono                                0x000000010130ef7e mono_jit_exec + 302
21  mono                                0x0000000101311387 mono_main + 8167
22  mono                                0x00000001012911ca main + 1690
23  mono                                0x0000000101290b24 start + 52


Debug info from gdb:


(lldb) command source -s 0 '/tmp/mono-gdb-commands.av4FCu'
Executing commands in '/tmp/mono-gdb-commands.av4FCu'.
(lldb) process attach --pid 33185
warning: (x86_64) /Library/Frameworks/Mono.framework/Versions/5.2.0/lib/mono/4.5/mscorlib.dll.dylib empty dSYM file detected, dSYM was created with an executable with no debug info.
warning: (x86_64) /Library/Frameworks/Mono.framework/Versions/5.2.0/lib/libglib-2.0.0.dylib empty dSYM file detected, dSYM was created with an executable with no debug info.
Process 33185 stopped
* thread #1, name = 'tid_307', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
    frame #0: 0x00007fff91f1a3ee libsystem_kernel.dylib`__wait4 + 10
libsystem_kernel.dylib`__wait4:
->  0x7fff91f1a3ee <+10>: jae    0x7fff91f1a3f8            ; <+20>
    0x7fff91f1a3f0 <+12>: movq   %rax, %rdi
    0x7fff91f1a3f3 <+15>: jmp    0x7fff91f12cd4            ; cerror
    0x7fff91f1a3f8 <+20>: retq   
Target 0: (mono) stopped.


Executable module set to "/Library/Frameworks/Mono.framework/Versions/Current/Commands/mono".
Architecture set to: x86_64h-apple-macosx.
(lldb) thread list
Process 33185 stopped
* thread #1: tid = 0x214be6e, 0x00007fff91f1a3ee libsystem_kernel.dylib`__wait4 + 10, name = 'tid_307', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  thread #2: tid = 0x214be70, 0x00007fff91f19bf2 libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'SGen worker'
  thread #3: tid = 0x214be71, 0x00007fff91f12386 libsystem_kernel.dylib`semaphore_wait_trap + 10, name = 'Finalizer'
  thread #4: tid = 0x214be72, 0x00007fff91f1a44e libsystem_kernel.dylib`__workq_kernreturn + 10
  thread #5: tid = 0x214be73, 0x00007fff91f1a44e libsystem_kernel.dylib`__workq_kernreturn + 10
  thread #6: tid = 0x214be78, 0x00007fff91f1a44e libsystem_kernel.dylib`__workq_kernreturn + 10
  thread #7: tid = 0x214beaf, 0x00007fff91f19bf2 libsystem_kernel.dylib`__psynch_cvwait + 10, name = 'Timer-Scheduler'
(lldb) thread backtrace all
* thread #1, name = 'tid_307', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  * frame #0: 0x00007fff91f1a3ee libsystem_kernel.dylib`__wait4 + 10
    frame #1: 0x0000000101349d1d mono`mono_handle_native_crash(signal="SIGSEGV", ctx=<unavailable>, info=<unavailable>) at mini-exceptions.c:2555 [opt]
    frame #2: 0x00000001013afaf6 mono`altstack_handle_and_restore(ctx=0x00007fff5e970040, obj=0x0000000000000000, stack_ovf=0) at exceptions-amd64.c:795 [opt]
    frame #3: 0x00007fff8e2b307f SkyLight`SLDisplayBounds + 50
    frame #4: 0x00000001059d975e
    frame #5: 0x00000001017b941f
    frame #6: 0x00000001012a0135 mono`mono_jit_runtime_invoke(method=<unavailable>, obj=0x0000000000000000, params=<unavailable>, error=<unavailable>) at mini-runtime.c:2549 [opt]
    frame #7: 0x00000001014a1948 mono`do_runtime_invoke(method=0x00007fcf8e02a1e8, obj=0x0000000000000000, params=0x0000000000000000, exc=0x00007fff5e970918, error=0x00007fff5e970b18) at object.c:2829 [opt]
    frame #8: 0x000000010149d8dd mono`mono_runtime_class_init_full [inlined] mono_runtime_try_invoke(method=<unavailable>, obj=<unavailable>, params=<unavailable>, error=0x00007fff5e970b18) at object.c:2937 [opt]
    frame #9: 0x000000010149d89c mono`mono_runtime_class_init_full(vtable=0x00007fcf8d1b6f30, error=0x00007fff5e970b18) at object.c:471 [opt]
    frame #10: 0x0000000101299b2a mono`mono_jit_compile_method_inner(method=<unavailable>, target_domain=<unavailable>, opt=<unavailable>, error=0x00007fff5e970b18) at mini.c:4365 [opt]
    frame #11: 0x000000010129c47a mono`mono_jit_compile_method_with_opt(method=<unavailable>, opt=<unavailable>, jit_only=0, error=<unavailable>) at mini-runtime.c:1889 [opt]
    frame #12: 0x000000010134c29f mono`common_call_trampoline(regs=0x00007fff5e970bf8, code="H\x8b?H??\xa8H\x8b??8, m=<unavailable>, vt=0x0000000000000000, vtable_slot=0x0000000000000000, error=0x00007fff5e970b18) at mini-trampolines.c:704 [opt]
    frame #13: 0x000000010134bdb9 mono`mono_magic_trampoline(regs=<unavailable>, code=<unavailable>, arg=<unavailable>, tramp=<unavailable>) at mini-trampolines.c:834 [opt]
    frame #14: 0x000000010170139e
    frame #15: 0x0000000104d8dfd5
    frame #16: 0x0000000104b457b7
    frame #17: 0x0000000104b45480
    frame #18: 0x00000001017b900c
    frame #19: 0x00000001012a0135 mono`mono_jit_runtime_invoke(method=<unavailable>, obj=0x0000000000000000, params=<unavailable>, error=<unavailable>) at mini-runtime.c:2549 [opt]
    frame #20: 0x00000001014a1948 mono`do_runtime_invoke(method=0x00007fcf8ce09f38, obj=0x0000000000000000, params=0x00007fff5e971660, exc=0x0000000000000000, error=0x00007fff5e9716b0) at object.c:2829 [opt]
    frame #21: 0x00000001014a4dbc mono`do_exec_main_checked [inlined] mono_runtime_invoke_checked(method=0x00007fcf8ce09f38, obj=<unavailable>, params=0x00000001018003e8, error=0x00007fff5e9716b0) at object.c:2983 [opt]
    frame #22: 0x00000001014a4d7b mono`do_exec_main_checked(method=0x00007fcf8ce09f38, args=<unavailable>, error=0x00007fff5e9716b0) at object.c:4623 [opt]
    frame #23: 0x000000010130ef7e mono`mono_jit_exec(domain=<unavailable>, assembly=<unavailable>, argc=1, argv=0x00007fff5e971af0) at driver.g.c:1040 [opt]
    frame #24: 0x0000000101311387 mono`mono_main [inlined] main_thread_handler at driver.g.c:1109 [opt]
    frame #25: 0x0000000101311350 mono`mono_main(argc=<unavailable>, argv=<unavailable>) at driver.g.c:2247 [opt]
    frame #26: 0x00000001012911ca mono`main [inlined] mono_main_with_options(argc=2, argc=2, argc=2, argv=0x00007fff5e971ae8, argv=0x00007fff5e971ae8, argv=0x00007fff5e971ae8) at main.c:46 [opt]
    frame #27: 0x00000001012911b9 mono`main(argc=2, argv=0x00007fff5e971ae8) at main.c:339 [opt]
    frame #28: 0x0000000101290b24 mono`start + 52
  thread #2, name = 'SGen worker'
    frame #0: 0x00007fff91f19bf2 libsystem_kernel.dylib`__psynch_cvwait + 10
    frame #1: 0x00007fff9200586e libsystem_pthread.dylib`_pthread_cond_wait + 712
    frame #2: 0x0000000101518755 mono`thread_func [inlined] mono_os_cond_wait(mutex=0x000000010166e848) at mono-os-mutex.h:173 [opt]
    frame #3: 0x0000000101518746 mono`thread_func(thread_data=0x00000001017ae108) at sgen-thread-pool.c:130 [opt]
    frame #4: 0x00007fff920049af libsystem_pthread.dylib`_pthread_body + 180
    frame #5: 0x00007fff920048fb libsystem_pthread.dylib`_pthread_start + 286
    frame #6: 0x00007fff92004101 libsystem_pthread.dylib`thread_start + 13
  thread #3, name = 'Finalizer'
    frame #0: 0x00007fff91f12386 libsystem_kernel.dylib`semaphore_wait_trap + 10
    frame #1: 0x000000010149a293 mono`finalizer_thread [inlined] mono_os_sem_wait(flags=MONO_SEM_FLAGS_ALERTABLE) at mono-os-semaphore.h:91 [opt]
    frame #2: 0x000000010149a288 mono`finalizer_thread [inlined] mono_coop_sem_wait(flags=MONO_SEM_FLAGS_ALERTABLE) at mono-coop-semaphore.h:43 [opt]
    frame #3: 0x000000010149a280 mono`finalizer_thread(unused=<unavailable>) at gc.c:866 [opt]
    frame #4: 0x000000010146d69b mono`start_wrapper [inlined] start_wrapper_internal at threads.c:829 [opt]
    frame #5: 0x000000010146d601 mono`start_wrapper(data=<unavailable>) at threads.c:891 [opt]
    frame #6: 0x00007fff920049af libsystem_pthread.dylib`_pthread_body + 180
    frame #7: 0x00007fff920048fb libsystem_pthread.dylib`_pthread_start + 286
    frame #8: 0x00007fff92004101 libsystem_pthread.dylib`thread_start + 13
  thread #4
    frame #0: 0x00007fff91f1a44e libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff92004695 libsystem_pthread.dylib`_pthread_wqthread + 1426
    frame #2: 0x00007fff920040f1 libsystem_pthread.dylib`start_wqthread + 13
  thread #5
    frame #0: 0x00007fff91f1a44e libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff92004695 libsystem_pthread.dylib`_pthread_wqthread + 1426
    frame #2: 0x00007fff920040f1 libsystem_pthread.dylib`start_wqthread + 13
  thread #6
    frame #0: 0x00007fff91f1a44e libsystem_kernel.dylib`__workq_kernreturn + 10
    frame #1: 0x00007fff92004502 libsystem_pthread.dylib`_pthread_wqthread + 1023
    frame #2: 0x00007fff920040f1 libsystem_pthread.dylib`start_wqthread + 13
  thread #7, name = 'Timer-Scheduler'
    frame #0: 0x00007fff91f19bf2 libsystem_kernel.dylib`__psynch_cvwait + 10
    frame #1: 0x00007fff9200586e libsystem_pthread.dylib`_pthread_cond_wait + 712
    frame #2: 0x000000010148fd97 mono`mono_os_cond_timedwait(cond=0x00007fcf8d8198d8, mutex=0x00007fcf8d819898, timeout_ms=499) at mono-os-mutex.h:216 [opt]
    frame #3: 0x000000010148e91d mono`mono_w32handle_timedwait_signal_handle [inlined] mono_w32handle_timedwait_signal_naked(cond=<unavailable>, mutex=<unavailable>, timeout=499, poll=0, alerted=<unavailable>) at w32handle.c:976 [opt]
    frame #4: 0x000000010148e915 mono`mono_w32handle_timedwait_signal_handle(poll=0, handle=<unavailable>, timeout=<unavailable>, alerted=<unavailable>) at w32handle.c:1091 [opt]
    frame #5: 0x000000010148e7bb mono`mono_w32handle_wait_one(handle=0x0000000000000401, timeout=499, alertable=<unavailable>) at w32handle.c:1210 [opt]
    frame #6: 0x000000010148ea9e mono`mono_w32handle_wait_multiple(handles=<unavailable>, nhandles=<unavailable>, waitall=<unavailable>, timeout=<unavailable>, alertable=<unavailable>) at w32handle.c:1244 [opt]
    frame #7: 0x00000001014681e3 mono`mono_wait_uninterrupted(thread=<unavailable>, numhandles=<unavailable>, handles=<unavailable>, waitall=<unavailable>, ms=<unavailable>, error=<unavailable>) at threads.c:1892 [opt]
    frame #8: 0x0000000101468500 mono`ves_icall_System_Threading_WaitHandle_WaitOne_internal(handle=0x0000000000000401, ms=-1) at threads.c:2017 [opt]
    frame #9: 0x00000001059d4b4e
    frame #10: 0x0000000103314ff0 mscorlib.dll.dylib`System_Threading_WaitHandle_InternalWaitOne_System_Runtime_InteropServices_SafeHandle_long_bool_bool + 64
    frame #11: 0x0000000103314f9c mscorlib.dll.dylib`System_Threading_WaitHandle_WaitOne_long_bool + 44
    frame #12: 0x0000000103314e03 mscorlib.dll.dylib`System_Threading_WaitHandle_WaitOne_int_bool + 51
    frame #13: 0x0000000103314f2c mscorlib.dll.dylib`System_Threading_WaitHandle_WaitOne_int + 28
    frame #14: 0x000000010331b807 mscorlib.dll.dylib`System_Threading_Timer_Scheduler_SchedulerThread + 2423
    frame #15: 0x000000010330e187 mscorlib.dll.dylib`System_Threading_ThreadHelper_ThreadStart_Context_object + 151
    frame #16: 0x000000010330be21 mscorlib.dll.dylib`System_Threading_ExecutionContext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object_bool + 33
    frame #17: 0x000000010330bdb0 mscorlib.dll.dylib`System_Threading_ExecutionContext_Run_System_Threading_ExecutionContext_System_Threading_ContextCallback_object + 80
    frame #18: 0x000000010330e2cf mscorlib.dll.dylib`System_Threading_ThreadHelper_ThreadStart + 47
    frame #19: 0x00000001017c3b81
    frame #20: 0x00000001012a0135 mono`mono_jit_runtime_invoke(method=<unavailable>, obj=0x0000000101851df0, params=<unavailable>, error=<unavailable>) at mini-runtime.c:2549 [opt]
    frame #21: 0x00000001014a1948 mono`do_runtime_invoke(method=0x00007fcf8d1acfb8, obj=0x0000000101851df0, params=0x0000700010326e58, exc=0x0000000000000000, error=0x0000700010326e60) at object.c:2829 [opt]
    frame #22: 0x000000010146d6ce mono`start_wrapper [inlined] start_wrapper_internal at threads.c:837 [opt]
    frame #23: 0x000000010146d601 mono`start_wrapper(data=<unavailable>) at threads.c:891 [opt]
    frame #24: 0x00007fff920049af libsystem_pthread.dylib`_pthread_body + 180
    frame #25: 0x00007fff920048fb libsystem_pthread.dylib`_pthread_start + 286
    frame #26: 0x00007fff92004101 libsystem_pthread.dylib`thread_start + 13
(lldb) detach


=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================


(lldb) quit
Process 33185 detached
Abort trap: 6

0
Prashant
Top achievements
Rank 1
answered on 16 Oct 2017, 02:45 AM

Get this error upon running the command

Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.

(lldb) quit
Process 33185 detached
Abort trap: 6

0
Aiden
Top achievements
Rank 1
answered on 12 Jan 2018, 07:41 AM

If you installed mono with homebrew, try this

```sh

brew cask install mono-mdk

 

# and... PATH setting in your profile (ex ~/.bash_profile or ~/.zshrc)

export MONO_HOME=/Library/Frameworks/Mono.framework/Home

export PATH=[....previous path setting]:$MONO_HOME/bin

 

# mono run with argument

mono --arch=32 Fiddler.exe

```

0
Rahul
Top achievements
Rank 1
answered on 28 Nov 2018, 10:27 PM

After reading through the Blogs, I had tried both the mechanism however the none of them worked, encountering below error : 

m-rparihar:fiddler-mac rahul.parihar$ mono --arch=64 Fiddler.exe
WARNING: The Carbon driver has not been ported to 64bits, and very few parts of Windows.Forms will work properly, or at all
Stacktrace:


  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Windows.Forms.XplatUICarbon.CGDisplayBounds (intptr) [0x00002] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.XplatUICarbon.get_WorkingArea () [0x00005] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.XplatUICarbon.get_VirtualScreen () [0x00000] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.XplatUI.get_VirtualScreen () [0x00000] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Screen..cctor () [0x00034] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001e] in <14f1e720d53a4a6a8800252bec102319>:0
  at <unknown> <0xffffffff>
  at System.Windows.Forms.Form.get_CreateParams () [0x00157] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Control.CreateHandle () [0x0002a] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Form.CreateHandle () [0x00000] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Control.CreateControl () [0x00039] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Control.SetVisibleCore (bool) [0x00057] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Form.SetVisibleCore (bool) [0x00065] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Control.set_Visible (bool) [0x00009] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at System.Windows.Forms.Control.Show () [0x00000] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control.Show () [0x00031] in <7cb6368c5ba549ff8a02965fd9de701e>:0
  at Fiddler.frmViewer.‹• (string[]) [0x00081] in <09623c708fdb40a483cea147bbea7a7f>:0
  at Fiddler.frmViewer.‡• (string[]) [0x00016] in <09623c708fdb40a483cea147bbea7a7f>:0
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) [0x0004e] in <09623c708fdb40a483cea147bbea7a7f>:0
exception inside UnhandledException handler: The type initializer for 'System.Windows.Forms.Screen' threw an exception.


[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'System.Windows.Forms.Screen' threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object
  at (wrapper managed-to-native) System.Windows.Forms.XplatUICarbon.CGDisplayBounds(intptr)
  at System.Windows.Forms.XplatUICarbon.get_WorkingArea () [0x00005] in <7cb6368c5ba549ff8a02965fd9de701e>:0 
  at System.Windows.Forms.XplatUICarbon.get_VirtualScreen () [0x00000] in <7cb6368c5ba549ff8a02965fd9de701e>:0 
  at System.Windows.Forms.XplatUI.get_VirtualScreen () [0x00000] in <7cb6368c5ba549ff8a02965fd9de701e>:0 
  at System.Windows.Forms.Screen..cctor () [0x00034] in <7cb6368c5ba549ff8a02965fd9de701e>:0 
   --- End of inner exception stack trace ---
  at System.Windows.Forms.MessageBox+MessageBoxForm.InitFormsSize () [0x00002] in <7cb6368c5ba549ff8a02965fd9de701e>:0 
  at System.Windows.Forms.MessageBox+MessageBoxForm.RunDialog () [0x0000f] in <7cb6368c5ba549ff8a02965fd9de701e>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.MessageBox+MessageBoxForm.RunDialog()
  at System.Windows.Forms.MessageBox.Show (System.Windows.Forms.IWin32Window owner, System.String text, System.String caption, System.Windows.Forms.MessageBoxButtons buttons, System.Windows.Forms.MessageBoxIcon icon) [0x0000b] in <7cb6368c5ba549ff8a02965fd9de701e>:0 
  at Fiddler.FiddlerApplication.DoNotifyUser (System.Windows.Forms.IWin32Window ownerWnd, System.String sMessage, System.String sTitle, System.Windows.Forms.MessageBoxIcon oIcon) [0x0002c] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.FiddlerApplication.DoNotifyUser (System.String sMessage, System.String sTitle, System.Windows.Forms.MessageBoxIcon oIcon) [0x00000] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.FiddlerApplication.ReportException (System.Exception eX, System.String sTitle, System.String sCallerMessage) [0x001a4] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.FiddlerApplication.ReportException (System.Exception ‚) [0x00006] in <09623c708fdb40a483cea147bbea7a7f>:0 
  at Fiddler.frmViewer.• (System.Object, System.UnhandledExceptionEventArgs •) [0x00006] in <09623c708fdb40a483cea147bbea7a7f>:

0
Alexander
Telerik team
answered on 29 Nov 2018, 06:44 AM
Hi Rahul,

The command should be "mono --arch=32 Fiddler.exe" (notice the 32  in the --arch parameter).

As a side note - have you tried the new Fiddler Everywhere?

Regards,
Alexander
Progress Telerik
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0
Rahul
Top achievements
Rank 1
answered on 29 Nov 2018, 07:08 PM
fiddlerrootcer.jpeg

Hi Alexander, 

using mono --arch=32 Fiddler.exe command running on default port: 8888, however the problem here is registering the FiddlerRoot.cer file and even Trusting this certificate, mac doesn't capture the required Traffice from the Browser?

will appreciate a solution here so that , we don't spine a docker image of windows and run this useful tool everytime, so would like a solution to this problem. 

We are using your Edge license.

Rahul.

0
Alexander
Telerik team
answered on 03 Dec 2018, 11:37 AM
Hi,

HTTPS decryption does not affect the traffic capturing, i.e. if Fiddler does not capture traffic from application X configuring HTTPS decryption would not fix it. Would it be possible to share a screenshot of the proxy settings tab for your active network connection?

Regards,
Alexander
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Rahul
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answered on 03 Dec 2018, 05:06 PM
webproxy(http)img.jpeg

Hi,

Attach the (HTTP) connection setting from my machine. 

Thxs.

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Rahul
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answered on 03 Dec 2018, 05:09 PM
securewebproxy(https).jpeg
SecureWebProxy(HTTPS)
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Alexander
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answered on 06 Dec 2018, 05:23 AM
Hello,

Yes, I see the problem. By default on startup Fiddler changes the proxy settings to point to 127.0.0.1:8888. In order to do so, Fiddler needs elevated privileges and asks for password. Was there a password prompt on startup?

Regards,
Alexander
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