Error when outputting Open POs by Vendor report

Whenever a user Exports to PDF they are getting the following error:

Program stopped at 'poreport_reportC.4gl', line number 730.

FORMS statement error number -1332.

A character variable has referenced subscripts that are out of range

Standard PO Report

Open POs by vendor 

This is a Muni Defect 

• Check off the option Initial sort by Dept/Loc 

• Download  MUN-352510