It runs fine in 10.4.1 with python 2.7.10 running on 64 Bit, Win 7.
When trying to run in 10.3.1, python 2.7.8, 32 bit, Win 2012 R2 it fails.
This worked fine using mixed environment up until a couple weeks ago. Now I get the ambiguous
#! END_TCL="" error.