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What to do if you get the message "object library invalid"

If you get the message "object library invalid" when you open Excel or when you close excel after installing the add-ins, the problem is caused by a problem with the installation of Microsoft Office.  There is not a problem with the add-ins.  Re-installing our add-ins does not solve.

The problem is often caused by un-installing a trial version of Excel 2007, a missing service pack or an Office patch that was automatically run by Windows.  It is sometimes caused by getting Office pre-installed on the PC when you purchase the PC. 

Please follow the instructions on our page on how to repair Office to solve.