After tryin to convert a file from avi to dvd I got this message. AVISYNTH OPEN FAILURE:
AVISOURCE: COULD NOT DECOMPRESS FRAME 0

Does anybody know what this means???

I did what you told me to do and I also went on avi2dvds web site and on the faqs page it told me to follow this step. I did and and i dont get the error message but its still doing the same thing. Not giveing me video just sound.

This is from avi2dvds website faqs:
(3)I got this error : Avisynth:caught an access violation at 0x01be20f2
Typical error when there is a problem with the AVI, even though it appears to play okay.
Try these solutions :
solution1) Load the avi into VirtualDub Mod or Nandub (if you get an audio error when loaded),
set Video & Audio to Direct Stream Copy and then Save AVI.
This just basically re-muxes the Video & Audio and can "clean up" an AVI simply.
Then try encoding that again.
If still a problem, set Video & Audio to Full Processing Mode, for Video compression
set to Xvid at a bitrate a bit bigger than the original, then Save AVI.
Can take an hour to reencode.
solution2) try DivFix ( http://divfix.maxeline.com/divfix.html )
solution3) try DivXRepair ( http://divxrepair.sourceforge.net )
(Source : http://club.cdfreaks.com/lite/t-91680 )