The PC owner regularly opens up a MS Word document that has a Excel spreadsheet merged to it. All of a sudden it now gets an error message "Waiting for Microsoft Excel to accept DDE Commands".
We renamed the xls file xxxxOLD and pasted a backup of the file to the directory but got the same error message.
By the way, the backup file had not been updated for several months. The DDE error message originates from a Word file just a few days old.