1. Is that 2.4.9, meaning a known buggy version I've since replaced?
2. Are you trying to run it from the VB front end or as a stand alone executable?
If you're running it from inside VB, this is a known issue which I fixed for myself and you can too!
Search the project for "Numsgil". You'll find this comment:
'this just helps numsgil not get a 'where is sysvars2.21' error
'when running from inside VB
'(PY, feel free to change this to suite your needs as well
The line that follows rigs the code to look in the proper place. Feel free to change that line to your own program directory.