Cannot open the illustrator, the illustrator ended unexpectedly

Hello there,
I have worked with some large file in Adobe Illustrator CS6 and when I opened it again this error appeared and closed the program. It works fine with a small project and files without any error. Now I really need to modify some projects in Illustrator, but I can’t because of this error message. Can anyone help me to fix this problem ? Why I have this error with large projects ?
Thank you !

Adobe Illustrator
Can’t open the illustrator. The illustrator ended unexpectedly.
Offending Operator: “XI”
