
I can't retreat to a previous save because it seems to make the entire file inoperable - even if I open different copied versions of the file, I receive an error.
The only thing that's different on this particular project from any others that I've used is that I have .AVI files generated in CamStudio in the video track, but these have been inserted and edited without difficulty so I don't think that that's the issue - this error seems to pop up randomly.
Thanks a lot for your help.