In reply to Karthicl.

Hello,
There can be various reasons for this error such as issues with formulas, styles and things of this nature. The best way to debug a problem such as this is to comment out or remove the style overrides where you are adding things like formulas and styles tod see if you sill get the error when attempting to open the file. If you need further help with this, please either email me or open a tracking entry with Technical Support and we will help determine how to correct the issue.

Sincerely,
Chevell