Python Not Calling An External Program Part 2

I am having problems running a python program (plpython3u, really) as a trigger from postgres (9.2). The trigger calls the python program with the following statement: perform s

Solution 1:

The error suggests user that runs Postgres/plpython has no execution permissions on that .bat file (at least that's what I was getting in plain Python programs). This might not be a problem with subprocess itself.