AviSynth script to .AVI problem

[Valdez]

Trying to save an AviSynth script to .avi file, I use Avs2Avi, which I call from the AviSynth editor AvsP.
I'm asked for the compression method, I select Xvid. On the first frame I get the error 'statsfile not found' and then an error message:

Traceback (most recent call last):
File "E:\Video\AvsP\tools\avs2avi_gui.py", line 206, in OnButtonRunStop
ctypes.windll.user32.SendMessageA(self.jobInfo['pid'], WM_CLOSE, 0, 0)
NameError: global name 'ctypes' is not defined

Any hint as to what is going wrong? Do you recommend another tool for this job?
TIA

[thetoof]

To encode to XviD or x264, meGUI is a very useful tool.

If you need a lossless pass, you can give a shot to virtualdub/virtualdubmod