An unexpected error on loading Framework Library on MAC PC

Hi techies,
Some of our office workers are using MAC machines for their work.
When one of the office worker is working on Microsoft Word for MAC, he encountered this error message that tells him" An unexpected error occurred while trying to load the Microsoft Framework library".
An unexpected error occurred while trying to load the Microsoft Framework library.
This message will be displayed when ever Microsoft Word is started. What I did is, to re install the whole Microsoft Office for MAC, and restarted the computer again. While trying to load Microsoft Windows and still it will not start. I am now wondering on other solution and ran out of ideas. Please share some views on our problem. All your suggestions are greatly welcome and appreciated.
Loads of thanks.
