Hi Troels, I was wondering if you could have a look at this. The auto-generated grace2images.py script you added a while ago (http://article.gmane.org/gmane.science.nmr.relax.scm/17952) has been reported to fail on MS Windows with the error: File "C:\Python27\lib\subprocess.py", line 948, in _execute_child startupinfo) WindowsError: [Error 2] The system cannot find the file specified.) Would you know what is happening? Cheers, Edward