The semaphore timeout period has expired on Windows7


  • I maintain some software that makes a tcp socket connection to a different piece of software and sends data back and forth (pretty basic stuff there). We use boost asio to handle reading and writing of data over the socket connection. We have a client that has deployed this software on Windows7. The client has been having issues with our software not being able to maintain a reliable socket connection. One thing I have noticed is that quite often the networking callback are receiving the error: The semaphore timeout period has expired.

    This error is not coming from anywhere in our code (or the boost code). I've done some research on it and I found a Microsoft Knowledge base article on this error for Windows XP ( I've seen a few people ask questions about this error on Windows7, but they're all in regards to moving files to different drives, nothing regarding network connections.

    What does this error mean in regards to Windows7? Does the knowledge base article I mentioned still apply to Windows7?

    Wednesday, September 23, 2015 9:05 PM

All replies

  • Hi,

    Have you uninstalled the software and then check the network? If the network is normal without the software, I infer it maybe the software issue, you can check the compatibility in the link below.

    If the compatibility is well after you checked, I suggest you follow the steps below to troubleshoot.

    Firstly, update you network driver in device manager. Then disable the firewall and anti-virus software for test. If necessary, you need to uninstall the anti-virus software.

    Secondly, you would better to check the supported platform version such as Visual C++ in the link below.

    Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

    If it doesn’t work, there is an article below about how to troubleshoot the error. Pay attention to the case that the PC is in a domain.

    In the link, you can use process monitor to identify the problematic file with long path name, and then delete it or reduce its path name. If the problematic file is the software, you have to contact the software vendor for help.

    Wish you will troubleshoot the issue smoothly.                                                       

    Best Regards


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    Thursday, September 24, 2015 8:42 AM