[AccessD] Cannot Compact and Repaid (Access 2003)

I have an app that reports ``Invalid operation` when I attempt to compact
and repair. I already tried creating a new one and importing everything, and
I get the same error on the new one. I can however successfully compile the
app. I am puzzled. There are lots of forms, queries, reports and modules, so
I really do not want to import them one by one to see where the problem
lies. Any other suggestions?

TIA,

Arthur