Creo 8.0_Crashes while opening large Assembly

[Tuan_HQ]

I can't open my Top assembly file, I applied a few notebooks for my design (Model and Assembly),

I found an error message below the message log bar: "All notebooks referenced by model A will be retrieved". I tried to fix this by undeclare the notebooks in this model but it still happens with the other

It just happened 1 day ago, before I could open it normally.

Do you have any solutions for this such Crashes

[Chris3]

Can you open using open rep and then exclude all components and see if that works? If it does then keep doing that adding back in components until you find out what causes it to crash.