CorelDraw Damaged or Corrupt .CDR file?

I have a 24 Meg Corel Draw 10 document that has become corrupt. I discovered that my drive C was full, and have found a number of 24 Meg .tmp files in my TEMP directory.
I think the drive became totally full during my last save.

Is there any way to recover my file, either from the CDR file or one of the temp files? I have no older copies of this file to fall back to.

When I try to open the CDR file I get Error Reading xxx file.

I have searched for a solution for hours but have found nothing. I have a deadline to meet in 2 days and would appreciate any advice.