What does this message mean? (I was saving changes to a Contract) ” The process cannot access the file ‘C:VISDocumentsAndImagesSales Orders03011SalesOrder.xls’ because it is being used by another process “

This message means the MS Excel document associated with the contract was open on the desktop while you were trying to make a change. If the document is open, changes cannot be saved, the solution is to close the MS Excel document