HP 3000 Manuals

MPE/iX Quick Reference Guide

GENCAT 

Use the GENCAT utility to modify a source catalog, or expand a formatted
message catalog (for instance, a message catalog in the user's native
language).  You don't need any special capabilities to use it.

               or     
     GENCAT               RUN GENCAT.PUB.SYS 

MPE/iX 5.0 Documentation