Where is REPORTS_CLASSPATH "really" set in Forms and Reports on Weblogic Server?

I have a test report that includes barcoded data that uses the IDautomation's LinearBarCode.jar java package, and a test form to call it from.  This test setup is running properly in my development (Builder) environment.  The setup included locating the .jar file in a "likely place" and adding a REPORTS_CLASSPATH variable entry pointing to it.  In my case I chose to go to my WebLogic Server production environment and choose the .jar file location there first.  I then duplicated that path on my develpment environment so the .jar file would be in the same place on both.  This strategy worked