Blender_icons_update.py - SVG icon generation to DAT file issue I have been trying to run the python blender_icons_update.py blender_icons.svg command from command prompt in the \release\datafiles folder, but without any luck. I get these errors: 

FileNotFoundError: [WinError 2] The system cannot find the file specified

Line 10 (in the blender_icons_update.py)  when it does the run(cmd) in line 33. 
subprocess.check_call(cmd)

Something is wrong with the subprocess. What is the fix?

I have correct Python versions installed (2.7 and 3.5.0), Blender 2.79b installed, and... what is missing?
The issue was that the paths were not defined for Inkscape and Blender. Both software do not add the PATH environment variables to Windows, so adding them manually made the script file find the correct software to process the *.dat files.