A fresh install.

with sample fiddlerscript fails to compile (do a save).  see attached screen shot

 

 

Few months ago , I still used XP operating system, 

and Fiddler worked fine on it. 

Then , due to some problem I faced on XP, 

I decided to install Win10 and abandon XP, 

after installing Fiddler and start on Win10, 

As the title said. 

I realized that Fiddler almost didn"t capture any traffic...... 

 

No matter what browser I use,it always could only capture one. 

The only one traffic Fiddler could capture was the website of Fiddler 

I recorded a video about the problem I mentioned above 

If my description isn"t clear , you could look this 

https://www.youtube.com/watch?v=CFc8rCry6F4 

(Although the language I use is Chinese,the same option can still be found acrroding to the sequence) 

(Extnesion) 

there is its message from log: 

20:50:09:6858 Fiddler Running... 
20:50:09:7054 Windows 8+ AppContainer isolation feature detected. 
20:50:09:7419 AutoProxy failed. Disabling for this network. 
20:50:44:7894 WinINET Registry change detected. Verifying proxy keys are intact... 
20:50:44:7899 WinINET API indicates that Fiddler is no longer attached.

fiddler.network.https> HTTPS handshake to 192.168.1.1 (for #2) failed. System.Security.Authentication.AuthenticationException A call to SSPI failed, see inner exception. < The client and server cannot communicate, because they do not possess a common algorithm

HTTPS handshake returned error SEC_E_ALGORITHM_MISMATCH.
Fiddler's Enabled HTTPS Protocols: [Default] are controlled inside Tools > Fiddler Options > HTTPS.

Hi,

      when I drag a file like 'XXX.har' into fiddler,it was nothing here.

I must click menu like file -> import session ->httpArchive and choose the file then it works.It is complicated.

     can this support for auto analysis when I drag a file like 'XXX.har' or other it already have.

Tks.

Dear Fiddler Development Team,

You colleagues from Smart-Soft here. We use FiddlerCore as part of out software - Traffic Inspector.

We have encountered an error with Fiddler software. It goes as follows:

Uncaught Exception in Session #7095 - Fiddler has encountered an unexpected problem. 
If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C,
and submit a bug report at http://www.telerik.com/forums/fiddler.  Reference does not point to the object instance.

Type: System.NullReferenceException Source: FiddlerCore    в Fiddler.ServerChatter.()    в Fiddler.Session.??()   
 в Fiddler.ServerChatter.??()    в Fiddler.Session.??()    в Fiddler.Session.??(Object )   Fiddler v3.0.2.916 (x64 AMD64) 
[.NET 4.0.30319.42000 on Microsoft Windows NT 6.2.9200.0]

So, what may be the problem? 

Thanks in advance

my wpf app using fiddlercore 4.0 ,but when my app runs,it hints that :
Fiddler v1.0.0.0 (x86 x86) [.NET 4.0.30319.42000 on Microsoft Windows NT 6.1.7601 Service Pack 1] 
** NotifyUser: Uncaught Exception in Session #686 - Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, please copy this message by hitting CTRL+C, and submit a bug report using the Help | Send Feedback menu.


未将对象引用设置到对象的实例。


Type: System.NullReferenceException
Source: FiddlerCore4
   在 Fiddler.ServerChatter.ConnectToHost()
   在 Fiddler.ServerChatter.SendRequest()
   在 Fiddler.Session.InnerExecute()
   在 Fiddler.Session.Execute(Object objThreadState)

what happent? what can i do to resolve it?

Please fix the Fiddler installer. Every update un-installs my previous installation (from the location I selected during initial install), and then, without choice, auto-installs to c:\users\%unsername%\...

The installer should respect the initial installation location, and update in-place.

I'm using Fiddler on Windows 10.  It was working fine a few days ago.  Now, no matter what I do, I cannot save sessions.  Fiddler crashes hard, ungracefully, and it basically means I can't send archives.  It also leaves the proxy enabled, meaning I have to manually go in and remove it.  I just can't believe I'm the only one having this.  It's probably some recent Windows Update.  Anyone else?

Hi,

trying to update fiddler to current version fails because the file uninst.exe of the previous version is missing. No idea, why.

How can I manually uninstall my current version of Fiddler to enable install of new version?

Regards,

Torsten

 

A month ago after a Fiddler upgrade I had a problem where it shows the splash screen and at the bottom it says "Searching for prior instance..." but nothing else ever occurs:  splash screen remains until process is killed manually.

At that time I tried some deinstall, reboot, reinstall activity without success.  Tried removing some Fiddler registry entries as well.

I reverted to version 4.4. something and that worked for the last month.  I was having some https issues so...

Today I upgraded again and have the same problem.  Splash screen says version is v4.6.20173.38786.  That is the only version listed in Control panel/Programs.

The program files do exist in AppData\Local\Programs\Fiddler and that dir is last entry in my PATH.  (Noting some previous installs were in Program Files and Pogram Files (x86) but there are no Fiddler dirs there now).

My account is in Administrators, and running Fiddler with right mouse/ as admin results in same splash hang.

Any ideas why it is hanging on the prior instance step?