Do you have the tnsname.ora file from the working systems replicated to the test systems or at least the section that enables Oracle to resolve the DB to which you connect? It should normally be in $ORACLE_HOME/network/admin/tnsnames.ora

Cheers,
R.

Pereant, qui ante nos nostra dixerunt!

In reply to Re: Testing a library that accesses an Oracle Database by Random_Walk
in thread Testing a library that accesses an Oracle Database by docdurdee

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