I also keep getting this same error. I used DIF4U and when i go to add avs files in CCE i get that same error. Not shure what to do. I think it might be that the install files are not right im thinking about formating the pc and starting over again.:confused: Please respond if you found out how to fix this error. If I do format what programs are needed? CCE, DIF4U, DVD Dycrypter, AviSynth, Synerist, DVD2AVI. Is that all of em? When i try in CCE 2.5 i also get an error with a differnt name AVIFileInfo: Unknown Error. MPC only plays sounds VirtualDub gives me an error Avisynth open failure: Avisynth: script open failed! WMP just hangs i dont know what to do other than format