Just in case someone else encounters this issue. We have Macs and PCs in our office. We were getting the following two errors on PCs after packaging up a recent project:
After Effects error: There was an error processing this PDF document. (1074397201) ( 50 :: 29 )
After Effects error: cannot reopen an open file. ( 3 :: 130 )
Followed by AE crashing.
Macs opened the packaged project with no errors.
SOLUTION: Prior to packaging, move all assets into folders with PC acceptable names (no \ / : * ? " < > | allowed). We usually do this but missed a folder with a "/" which was translated into an unreadable character (for PC) in the directory structure of the packaged project.
FEATURE REQUEST: A more meaningful error code(s) would have been helpful in tracking down this issue.
Thank you for sharing what worked for you! I'm sure it will be very helpful to some poor soul doing a forum search in the future!
You can file feature requests here. (This is just a user-to-user forum, so in order to make sure someone from Adobe sees your request, follow that link.)
Thanks! Feature request filed.