How can I fix this?
I had EXCEL 2013 Office Prof Plus (Evaluation). This problem was existing from day 1. When I tried to repair the evaluation period was cut short, after the repair the product wanted the product key again. Tried to install a new copy of Office Pro Plus without success (it did not install, period of evaluation over).
I signed on for Office 365 Enterprise and Excel is working on the desktop, but still get this Data Model damaged error.
Any help will be apprec