Adobe Illustrator software

Hello everyone.

When trying to open my .ai file in Illustator i get The illustration contains an illegal operand. error message.
How to make adobe illustrator file repair? It is very important file!

Regards,
Chris

Who can help me friends?

https://www.google.gr/?gfe_rd=cr&ei=...llegal+operand

Tried google?

Check this out.
http://lmgtfy.com/?q=The+illustratio...+operand+error