Subprocess window won't open on Mac

[blakefindlay]

So I've been working on a rental form program for my work. Long story short I am using tkinter gui and I've set up a subprocess to open the specific rental form program from the main menu. Each .py file opens perfectly fine individually but wont open when its called from the sub-process.

I get an error in terminal that says ImportError: No module named tkinter.

For the record, all of my .py files that are part of this have tkinter imported.

Any help is appreciated