Thank you guys for your feedback and help. Sorry, that long time did not respond. This is because the issue was solved and I forgot to tell.) Thank you!
I have a MS Project 03 mpp with 6000+ tasks that has become corrupted. We can still open and work with the file in Proj03, but it will not open in Proj07, which has now become our standard version.
I have tried all of the standard fixes without success (compact by saving on open, export to...