PyRun_FileEx returns NULL

[yobiminds]

I get a null in return from executing a script in a thread.

PyObject *result = PyRun_FileEx(f, fname_str.c_str(), start, global.ptr(), local.ptr(), closeFile);

What could possibly be the reason to return a null? The script works fine unless I try to import matplotlib or numpy, in this case it throws exeption, being 'result' = null.

Python interpreter is initialized in the thread.