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TCC 11.00.39 hangs on startup

Discussion in 'Support' started by Patulus, Feb 3, 2010.

  1. Patulus

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    Sometimes TCC silently hangs on startup. Process Explorer shows some minor activity in some worker threads, that's all. Process Monitor shows that TCC hanged after starting a couple of threads. It hangs even with /IS option. And before actually even start to execute the command file passed as a parameter.
     

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  2. rconn

    rconn Administrator
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    Those are not TCC threads. I would guess that another process is injecting
    a dll and/or remote threads into the TCC process. Check your system for
    things like anti-virus apps and display monitors, and try disabling them to
    see where the problem is coming from.

    Rex Conn
    JP Software
     
  3. Patulus

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    Hello Rex,

    Yes, it is possible, since I see some InitUserApiHook in the stack trace. I'll try to investigate it more closely.

    But... I have a question, Rex. Whatever hooks I have in my system, they do not cause any problems with other applications. The only reason of hangs connected with hooks I see is the not-so-well-known bug in the Windows x64 kernel, which limits drastically recursion depth of SendMessage in a case when there are some hooks set on message queue. So the question is: do you use SendMessage recursion extensively in TCMD?

    Patulus.
     
  4. rconn

    rconn Administrator
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    No.

    But Take Command is an unusual combination of a GUI and console app, and
    I've seen problems with poorly written injection code in the past.

    Rex Conn
    JP Software
     
  5. Patulus

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    I have found the culprit. This is WindowBlinds by Stardoc.
     
  6. Patulus

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