Running an executable as a windows service with a python node.

[JohnEE]

Hi All,

I am working on creating a windows service in LabView.  I started by making a test program that would write a time stamp to a file every second and installed it using NSSM.  Works well.  Then I added a python node to just write "Hello World" into the file after the first time stamp.  It locks up on the python node when installed as a service.  It works fine running it normally.  I have confirmed that my path is set to include the python install directory in the system variables. 

Does anyone have any ideas?  Please help...

TestServicePy.zip are the files I put in C:\TestServicePy and install as a service.  TestServicePy.vi is the source code.

Thanks!

John

[JohnEE · Accepted solution]

I updated the VI and exe to write errors to the file.  My mistake; it doesn't lock up.  It gives the following error when trying to open the python session:

Error Number: 1671
??? in TestDBService.lvlib:TestDBService.vi<APPEND>

Python returned the following error: Error creating host process

It seems I caused my own problem:  I am running the 32 bit version of LabView.  I had the 32 bit version of Python 3.6.8 installed for me only and the 64 bit version installed for all users.  I uninstalled both versions then installed the 32 bit version for all users.  Problem solved!