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Installation issue on windows 10

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Calvin
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Calvin asked on 24 Oct 2017, 03:02 PM

Hi there,

I got the following error on the first launching Fiddler after installed it on windows 10:

 

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Loading custom MIME mappings failed
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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.


There is an error in XML document (0, 0).


Type: System.InvalidOperationException
Source: System.Xml
   at System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)


   at System.Xml.Serialization.XmlSerializer.Deserialize(Stream stream)


   at Fiddler.XmlFileMimeMappings..ctor(String filePath) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\MimeMapping\XmlFileMimeMappings.cs:line 40


   at Fiddler.frmViewer.š(Object , EventArgs ) in C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Viewer.cs:line 9816


System.Xml.XmlException: Root element is missing.


   at System.Xml.XmlTextReaderImpl.Throw(Exception e)


   at System.Xml.XmlTextReaderImpl.ParseDocumentContent()


   at System.Xml.XmlReader.MoveToContent()


   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderList1.Read3_ArrayOfMimeMap()
Fiddler v4.6.20173.38786 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 10.0.10586.0]
---------------------------
OK  
---------------------------


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Alexander
Telerik team
answered on 26 Oct 2017, 10:06 AM
Hello,

In order to stop the exception from popping up, please, go and delete this file - %USERPROFILE%\Documents\Fiddler2\CustomMimeMappings.xml. If this does not fix the issue, please, do not hesitate to contact me back.

Regards,
Alexander
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Sidhartha
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answered on 05 Jan 2018, 02:19 AM

Hi,

Whenever I click on 'Composer' tab I get the following error and fiddler hangs. Only way is to kill and restart fiddler:

'Fiddler has encountered an unexpected problem. If you believe this is a bug in Fiddler, .....

Root element is missing.

Type: System.Xml.XmlException

SourceL System.Xml

at System.Xml.XmlTextReaderImpl.Throw(Exception e)

at System.Xml.XmlTextReaderImpl.ParseDocumentContent()

at Fiddler.Session.LoadMetadata(Stream strmMetadat) in

C:\JenkinsHome\jobs\FiddlerReleaseBuild\workspace\Fiddler2\Common\Core\Session.cs:link 1616

Fiddler v5.0.0.20173.50948(x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 10.0.16233.0]

'

Tried the following and still same error:

1. Deleted the file as suggested above

2. Uninstalled and reinstalled.

3. Uninstalled and deleted every trace of fiddler (even from registry) and installed

Please help,

Thanks in advance

 

 

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Alexander
Telerik team
answered on 15 Jan 2018, 06:48 PM
Hi,

Go to "%USERPROFILE%\Documents\Fiddler2\Captures\Requests" and remove the filed called "ComposerHistory.raz". This should fix the problem. Keep in mind that this will clear your Composer history.

Regards,
Alexander
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Calvin
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Alexander
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Sidhartha
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