Folder Creation Failed - System.IO.IOException

3 posts, 0 answers
  1. Deidre
    Deidre avatar
    2 posts
    Member since:
    Aug 2019

    Posted 06 Aug Link to this post


    Folder Creation 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

    The device does not recognize the command.

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

       at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost)

       at System.IO.Directory.InternalCreateDirectoryHelper(String path, Boolean checkHost)

       at Fiddler.CONFIG.() in C:\Jenkins\Fiddler_Windows\workspace\Fiddler2\Common\Application\Config.cs:line 1972

    Fiddler v5.0.20192.25091 (x64 AMD64) [.NET 4.0.30319.42000 on Microsoft Windows NT 10.0.15063.0] 

  2. Eric R | Technical Support Engineer
    Eric R | Technical Support Engineer avatar
    230 posts

    Posted 08 Aug Link to this post

    Hi Deidre,

    This usually happens when the C:// drive is full. Can you let me know if this is the case? If so, try clearing up some space on the drive and try again. 

    Please let me know if you need any additional information. Thank you for using the Fiddler Forums.


    Eric R | Technical Support Engineer
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  3. Deidre
    Deidre avatar
    2 posts
    Member since:
    Aug 2019

    Posted 08 Aug in reply to Eric R | Technical Support Engineer Link to this post

    I discovered the problem and corrected it.  Our Infra team has set the native laptop Documents folder to point to the \\\ cloud location without giving write permissions.  I changed it to a local folder location and all is well. 

    Thanks for the response.

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