The onbXXXX constants mentioned in the documentation are wrong. They should be nbXXXX. This unfortunately leads to the name clash you mentioned. To fix this, you can either inlcude the OracleNavigator unit before the DBCtrls unit in the 'uses' clause, or prefix the button name with the unit name (e.g. OracleNavigator.nbPost).
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Marco Kalter
Allround Automations