Bruce,
I think the problem is that you are assuming schema and table
names are case insensitive, and that null equals "". Try:

             mrs=dbm.getTables(null,"APP",null,null); // not
(null,"app",null,null)

and

             mrs=dbm.getImportedKeys(null,"APP","POLICY");  //
not ("","APP","policy")
Regards,

Peter Yuill

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