This is a migrated thread and some comments may be shown as answers.

got a error when first starting fiddler

1 Answer 466 Views
Windows
This is a migrated thread and some comments may be shown as answers.
kyle
Top achievements
Rank 1
kyle asked on 25 Jul 2020, 05:16 AM
---------------------------
Loading custom MIME mappings failed
---------------------------
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.

The cloud file provider is not running.



Type: System.IO.IOException
Source: mscorlib
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

   at System.IO.FileStream.ReadCore(Byte[] buffer, Int32 offset, Int32 count)

   at System.IO.FileStream.Read(Byte[] array, Int32 offset, Int32 count)

   at System.Xml.XmlTextReaderImpl.InitStreamInput(Uri baseUri, String baseUriStr, Stream stream, Byte[] bytes, Int32 byteCount, Encoding encoding)

   at System.Xml.XmlTextReaderImpl..ctor(String url, Stream input, XmlNameTable nt)

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

   at Fiddler.XmlFileMimeMappings..ctor(String filePath) in C:\Jenkins\Fiddler_Windows\workspace\FiddlerCore\FiddlerCore.Shared\Common\Core\MimeMapping\XmlFileMimeMappings.cs:line 40

   at Fiddler.frmViewer.š(Object , EventArgs ) in C:\Jenkins\Fiddler_Windows\workspace\Fiddler2\Fiddler.Shared\Viewer.cs:line 9968


Fiddler v5.0.20202.18177 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 10.0.18363.0] 
---------------------------
OK   
---------------------------

1 Answer, 1 is accepted

Sort by
0
Lini
Telerik team
answered on 29 Jul 2020, 06:31 AM

Hello,

This error happens while Fiddler is trying to load custom MIME mappings, which you probably don't have defined yet, since you are starting it for the first time. The file it is looking for is [Documents folder]\FiddlerCore\CustomMimeMappings.xml

It seems your Documents folder is not accessible for some reason or it is configured to use OneDrive, which is not running correctly. 

You can safely ignore this error if you are not using the custom mime mappings feature. If you want to fix it, you can try opening the OneDrive app settings on your computer (click the OneDrive icon in the taskbar, then go to settings) and in the first settings tab at the bottom disable the "Save space and download file as you use them" option. Save and restart your PC to apply the changes.

Regards,
Lini
Progress Telerik

Tags
Windows
Asked by
kyle
Top achievements
Rank 1
Answers by
Lini
Telerik team
Share this question
or