Try importing the project in a new project with the Caps Lock key pressed.
If that does not work try moving the source files to a different folder so the project opens without footage.
Corrupted Fonts can also be a problem. Corrupted footage can be a problem. Corrupted plug-ins could be a problem. Try deleting or moving each of these one at a time. Even if AE is opening other projects just fine, the program file may be corrupted. Try a re-install.
If none of that works then your .aep project file is probably corrupted and you're sunk.
Thanks for the reply, I'll try those a little later today to see it if helps.
What does holding the CAPS LOCK key do while importing?
Caps lock on when importing prevents AE from trying to render anything in a comp window. It often saves an import of a corrupted file. I meane Caps Lock on, not held down.
Thanks for the info Rick.
Just to fill everyone in on what happened. I tried all of your suggestions, but nothing worked. I even uninstalled/restarted/reinstalled AE CS5.5
I also attempted to open the file using a newly created "admin" account, but nothing worked.
I'm cery concerned about this problem because I even took the precausion of saving multiple versions of the project. Basically I "saved as" and added an incremental _01, _02, _03, etc.... ALL of the incremental files are currupted so I believe the problem is the result of the import from Premiere sequence and/or the dynamic linking. The weird thing is the premiere sequense still works fine. It is only the AE files built on the premiere import that are giving me problems.
Any other ideas anyone?
Something must have changed somewhere on the system. New font? New driver? New virus scanning software?
AE projects are not related at all to Premiere Pro projects other than the link. There's nothing in an AEP that says this came from Premiere once the footage is imported. There is nothing in Premiere Pro except a link to the AEP file. Move, rename, or delete one the other is unchanged. The only reference is to the footage.
Did you try moving the source files for the footage. Just temporarily rename the folder containing the footage then open AE and see if the project loads.