Have you tried running ScanPST.EXE on your PST file to see if it's been
damaged?

"DAH" wrote in message
...
When I open Outlook 2007 I get error message "could not open calendar",
When
I go to Calendar tab - blank. When I click on my calendar it reads
Outlook
coannot open this item. The item may be damaged. I can bring in the
Archive
calendar ok.