Filesystem backup error: Bad catalog access for message #1033 in set 80

Hi all,

Using DP 6.2 on a w2k3sp2 hp proliant server

had an error last night on a file system backup not previously seen:

Bad catalog access for message #1033 in set 80

This caused a subsequent:

Connection to Media Agent broken => aborting.

and a drive on a w2k3 vm server to fail.

Did a bit of digging and the best I could find was this:

http://h30499.www3.hp.com/t5/Data-Protector-Support-and-News/bad-catalog-access-for-message-102/td-p/4345320

Searched for omni.cat and found it in a location on the cell manager where it doesn't appear to be in use:

(Data Drive) \DP_Software\HP_DP_6.11_for_Windows_Netware_Media_Operations_B6960_15007_01_fixed\B6960-15007-01\NetWare\NetWare4-6\nls\C

I'm not sure if it is an issue with omni.cat I could be on the wrong track altogether. Could it be a tape issue or a catalog full or corrupt or something else?

All contributions greatly welcomed as per usual,

thanks,

Steven