For example, "missing 1 required positional argument" doesn't hang the process and it terminates after the session is closed. I cannot say this behavior is specific to this error, but it isn't all errors. When the type error occurs, it stays open through subsequent calls to the Close Python Session and even closing LabVIEW altogether. The python.exe window closes, not CMD (CMD doesn't open). Unfortunately Python window closes so I have no chance to see what the error is. But when I actually try to run the myscript.py, it crashes. The scripts I'm trying to invoke run pretty quickly and I am opening and closing the Python session every time I execute a task, so I normally don't even see the niPythonHost appear in the task manager because it closes so quickly. START python myscript.py While running myscript.py in Jupyter Notebook, it seems to work fine. On subsequent calls, I got "OSError: A dynamic link library (DLL) initialization routine failed." I spent quite a bit of time fiddling with things and googling thinking that this error was inherent to the code I'm executing before I figured out that killing the task niPythonHost task resolved the issue and the DLL loads fine as long as the Python host is in a clean state. If you need any more help, let me know, glad to help 1 Sponsored by Aspose Aspose.Words for. I got an error 1671 with the message "Python returned the following error: an integer is required (got type NoneType)". If you are not running it from command line, please do, otherwise your output may appear but terminal window will close right away not giving you chance to see the output of your program. I just spent some time trying to understand why I was getting errors loading a DLL and it took me a bit to realize something was wrong with the state of the niPythonHost. The exception code is: 0xc000005 memory access error.The LabVIEW/Python processes are running on memory constrained virtual machines (4GB).The LabVIEW routine is passing a fairly large 2D array (DBL) to Python.My current theory is that I'm hitting a memory limit which is causing issues in the niPythonHost process. Exception code 0xc000005 is a memory access error. VCRUNTIME140.dll is a C Runtime Library (2015). In the Windows Event Viewer I see the following Application Error when niPythonHost hangs:įaulting application name: niPythonHost.exe, version: 3.4, time stamp: 0x5e5cf5f6įaulting module name: VCRUNTIME140.dll, version: 3.0, time stamp: 0x574290adįaulting application path: C:\Windows\Program Files (x86)\National Instruments\Shared\NIPythonInterface\.\niPythonHost.exeįaulting module path: C:\Windows\SYSTEM32\VCRUNTIME140.dll My observation is the niPythonHost.exe process fails and hangs.The LabVIEW code containing the Python Node will not execute successfully until the niPythonHost.exe process is manually terminated. I'm seeing similar behavior with a complied LabVIEW application using the LV Python Node.
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