I am also getting this message  when I sign into QuickBooks on our server.  When I try to verify data integrity I get the message that there are problems with the company file and to do a rebuild - if I choose to view errors before the build  the message pops up again.  If I go through with the rebuild data file and it comes to the end with the message  "rebuilding has completed" and I choose View Results that message pops up again.