How to find a report program name called from SET_REPORT_OBJECT_PROPERTY in Oracle form?

Hello,

We are running Oracle report and forms 6i w/ dB 10.1g.  We have an Oracle report that is called from SET_REPORT_OBJECT_PROPERTY in Oracle form as shown below when the "Run Report" PB is pressed:

SET_REPORT_OBJECT_PROPERTY(repid, REPORT_FILENAME, SUBSTR(:SYSTEM.CURRENT_FORM, 5 , LENGTH(:SYSTEM.CURRENT_FORM) -4));

Where do I find the report file name w/ either rdf or rep extension???  I need to open the report file in Oracle Report Builder in order to troubleshoot the report.

Any/all the help on this would be greatly appreciated.  Thanks much in advance.