Hi…I just ran into a similar situation (compact instead of fixup)and found out that I had to run the command-prompt ‘As Administrator’ for this to work :-/
Subject: compact problem - elevated command prompt does the trick
Thanks, I was happy enough to stumble across your posting when this happened to me. I’m pretty sure, I knew that at some point in time before, but I did not remember.
The root problem seems to be that the error message is all wrong. The problem is about access rights.