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Event id 372 printservice windows 79/18/2023 Sometimes WTSVirtualChannelWrite fails, return 0, but the GetLastError returns error message "The function completed Sometimes it fails at the first call in the session, not only from a repeating call as the information given from MSDN engineer. What I have found is Virtual Channel functions now become very unstable: ex: with WTSVirtualChannelOpen, I have lost almost 2 weeks to deal with this problem to make a workaround for my client to get a stable working version of my Remote Executer program. In the first thread, there are questions asked, and someone has given some information from Microsoft MSDN team but they want people pay for more support about that bug. But since Windows 2012, someone in MSDN team has changed the implementation of this protocol then everything that uses Virtual Channel as communication transport layer becomes unstable, sometimes it works, sometimes not. Up to Windows 2008R2 there were no change at all and everything works ![]() This was developed by Citrix than was resold to Microsoft. ![]() Usually all communications between server and client side under a remote session (RDP or ICA of Citrix) use Virtual Channel. ![]() I have clients suffering with this bug with all my programs using Virtual Channel. This problem is a bug in Virtual Channel.
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