Excel Error

[halper]

I am using a model and I am getting the error below when I click
"SaveAs".

Microsoft Office Excel File Repair Log

Errors were detected in file 'C:\filename.xls'
The following is a list of repairs:

Damage to the file was so extensive that repairs were not possible.
Excel attempted to recover your formulas and values, but some data may
have been lost or corrupted.

Renamed invalid sheet name.
Renamed invalid sheet name.

When I am using the model it works fine, but once I click SaveAS, this
is the error the prompts me when I open the new file. Also, I am
noticing that two tabs are being added at the end of the document name.


Thanks for your help,
Scott