hello, I am running Simpy (python simulation framework) within pythondotnet, and, even though this process is single-thread, it hangs misteriously, in an unpredictable way... Python console cease to respond to Ctrl-C events... Here is the current Thread status: Thread Start Address: Symbol Name: Line Number: PC: mscoree!_CorExeMain() + 0x0 --- 7917D08C Thread Stack: ntdll ! KiFastSystemCallRet() + 0x KERNEL32 ! WaitForSingleObject() + 0x12 python24 ! PySys_WriteStderr() + 0x14d python24 ! PyTuple_Type() + 0x0 as the entry point in the hanging thread (higher on stack) is PyTuple_Type() and as PyTuple is defined in C# (src/runtime/PyTuple.cs), I suspect this might be the cause of my problem. [PythonNet-1.0-beta4]> grep -nr "PyTuple_Type" . Binary file ./DLLs/_socket.pyd matches Binary file ./python24.dll matches [PythonNet-1.0-beta4]> However, I would like to be able to go higher in the stack, to see what caused this deadlock. Any proposed strategy to guess what happened, or to track down the problem? thanks a lot, Stan.