LMF$DISPLAY_OPCOM_MESSAGE It needs to be /EXEC/SYSTEM, otherwise any herbert could overflow your LA36 :-) It was documented by mistake and then had to be explicitly documented as "don't do this" because lots of products go and check for any of the umpteen licences that *might* let them run. It's only a few (non-DEC) products that actually check for non-existant licences and require that the check fail. Antonio