After Effects Error:29::36

After Effects error:attempt to get a value from a time stream with no key values.

Hi Everyone,
I recently bought a file (today) here an video hive, and I am having this issue, the author has made a few suggestions, unfortunately they weren’t really sollutions. He did offer the info that he had not encountered this but recalls only one other person having this issue.
Anyone have any suggestions?
Many Thanks,
TTD

So I’m not sure if you ever figured this out. I just stumbled upon this and have a solution for you that usually works for me. I get that error sometimes if I drag a project into the project window to open it if the project has expressions in it. What works for me is to actually go to -file -open project. I usually stop getting the error after that. Its a weird bug thing when dragging and dropping projects to open them.