ABAQUS PDE problem - "remote process did not start"

I am having a problem with ABAQUS PDE. I get the following message when trying to debug a python script:

 

*Starting main file [Kernel]: c:/Users/Jonny/Documents/ABAQUS/Voronoi_Tesselation/makebc3.0.1.py

Spawn: abq6121 cae -rt c:/Users/Jonny/Documents/ABAQUS/Voronoi_Tesselation/makebc3.0.1.py

*** Error - remote process did not start

Exit from main file [Kernel]: c:/Users/Jonny/Documents/ABAQUS/Voronoi_Tesselation/makebc3.0.1.py

 

This is on a system with a fresh install of Windows 7 Pro and ABAQUS 6.12-1. The same python script works fine on other machines with the same software and OS setup.

Any help would be greatly appreciated!

  Thanks,

 

 - Jon