Is O: the directory that you are trying not to use?
I couldn't find a procedure for this, but I had a similiar query a couple of weeks ago. I gave the as instructions that I am about to give you, he has not confirmed if they worked for him
First, a little background. Some times, I have gotten a question regarding systems no longer in the cell, but are still showing up when doing a purge of filenames, for example. if there is no protected media, this can be resolved by doing a 'writedb/readdb' of the IDB
Using the same reasoning, you can try doing a 'writeb/readdb' of either the entire IDB, or just the Media Management part of the IDB
I always advise that you stop DP, and make a copy of 'db40' folder before doing anything to the IDB. Create a temporary destination folder, which I will designate by [temp_dir] in the example below, then, from the MS-DOS prompt
cd \Program Files\Omniback\bin
omnidbutil -writedb -mmdb [temp_dir] -cdb [temp_dir]
You may not need the 'cdb' part, and this will make it run faster
omnidbutil -readdb -mmdb [temp_dir] -cdb [temp_dir]