> Chopping things down to isolate the problem will take some
> time, I will get back to you.

You can drop as many table from the SupplyMast.fdb and Supply1800.fdb
as you wish, all dependencies have been removed too. As long as you drop
the same tables from both Fdb's, since the Meta data gets copied from
SupplyMast to Supply1800.fdb.new first and then the data gets copied
from Supply1800.fdb to Supply1800.fdb.new. The idea a long time ago
was that SupplyMast is the day to day fdb, which grows not only with
data but also with Meta data due to continuous development. Well every
year the third year of information was archived into an archive
Supplyyyyy.fdb
with and the information was purged from the SupplyMast.fdb.
The users wanted once a while check the archived data, however due to
the development of the metadata and Firebird newer version structures
the archived fdb's would become incompatible, unless their Meta data was
the same as the SupplyMast fdb.

Maybe a very rudimental way of doing things, but it worked and every one
was happy.

Best Regards
Hans