Cause of fsav.exe return code 12

What is the likely cause of error code 12 in Windows folder?


Or put another way: how can we reproduce this error code in a test environment?


I get that the description for error code 12 is "Failed to open some targets, these objects may still be infected".


  • Does this mean the file/folder is locked by another process?
  • Does this mean that the file/folder did not exist at all?
  • Does this mean that the file/folder was too large?

Best Answer

  • ollieeilloollieeillo Posts: 2
    Accepted Answer

    Here are the details:


    Windows 2012

    F-Secure version 14.55.111

    Run FSAV.exe from .NET process


    Turns out we had a threading issue, whereby the files in the folder were removed half way through the scan.


    I'm guessin the FSAV process enumerates the files in the folder first; and then iterates over the list. We had a densely populated folder so this took a while.


    Another process inadvertantly removed some of the files.


    Thanks anyways.



  • etomcatetomcat Posts: 1,318 Superuser



    We need details:


    - OS versions

    - F-Secure versions (endpoint software and centralized management software)

    - What were you trying to accomplish and how?


    Best regards: Tamas Feher, Hungary.

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