Just to put this on the record, because I doubt there is another animator on this forum who works the way I do. I have figured out how to export my AVIs into Vegas 17. The error was somewhat mine but not entirely because Vegas 17 must have changed and improved the path I used in 16 to now allow me to export my files in such a way that the clips I am working on in TVP can update my files (as I work on them and periodically save) into the Vegas timeline while both software remain opened. Each time I save to my TVP project as a *.tvp file my WIP is simultaneously transferred as an AVI file and refreshes the VEGAS file in its own timeline. Absolutely wonderful!
very very late but I was able to use ffmpeg to get the file working in vegas, but now with the latest update i don't need to do that anymore. importing the original file works now. don't know why lol