[Doom9]

I got the file. Created a dgindex project from it (using version 1.2.1 final), then loaded the d2v into megui's avisynth script creator (I'm afraid the dgindex project creator requies DVD Decrypter ripped input for now) which created a script for me and auto-loaded that script. Everything worked out just fine. So it's not so much the code as AVIFile failing on your PC. What kind of YV12 decoder do you have installed (open your AviSynth script in Graphedit)?

BTW, here's my script:
mpeg2source("D:\test.d2v")
LanczosResize(640,352)

dgindex.dll is located directly in the MeGUI directory (but that should only be required for the avisynth script creator) and in my avisynth autoload plugin directory.