> However I think this IS a bug in nbackup:
> It CAN attach to the database. (Using the alias. And I think, it did.
> Just to get the real database filenme.)
> It CAN access the file (running as root and having the correct
> filename).
> BUT it seems to reattch to the database using the full filename
> instead of the alias used earlier.

Right, nbackup first connects to the database using normal FB API
to switch it into "physical copy mode", and there is no problem.
Then it tries directly open db file to make the copy, and here it fails
if the DatabaseAccess is None. I think it is a bug if tool like nbackup
makes this kind of check.

Ivan