Fiddler crashes when opening Composer tab

5 posts, 1 answers
  1. Alex
    Alex avatar
    2 posts
    Member since:
    Jan 2018

    Posted 28 Jan 2018 Link to this post

    Reinstalling without keeping settings did not help. I'm guessing I have something really huge/corrupted in the Composer history. Which file / registry key should I delete?


  2. Answer
    Simeon avatar
    242 posts

    Posted 01 Feb 2018 Link to this post


    Try deleting the "Captures" folder with its content inside the  "%USERPROFILE%\Documents\Fiddler2" folder.

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  3. Alex
    Alex avatar
    2 posts
    Member since:
    Jan 2018

    Posted 02 Feb 2018 in reply to Simeon Link to this post

    Thanks for the help!

    Interestingly, there was no Fiddler2 in my Documents folder.

    Investigating the crash with procmon revealed that Fiddler was actually reading the history from %USERPROFILE%\OneDrive\Documents\Fiddler2 on my machine.

    Deleting Captures inside that folder solved the problem.

  4. Eric
    Eric avatar
    5 posts
    Member since:
    Feb 2012

    Posted 16 May 2018 Link to this post

    Closing Fiddler, then renaming ComposerHistory.raz to something else should be sufficient.
  5. andrew
    andrew avatar
    12 posts
    Member since:
    Sep 2008

    Posted 01 May 2019 Link to this post

    Deleting the Captures folder worked for me as well. Thanks!
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