Adding the originating module to the message text

You can add the name of the VTAM® module that issued the message to the message text. This can be done by using the MSGMOD start option when VTAM is started or by entering the MODIFY VTAMOPTS or MODIFY MSGMOD command.

If you specify MSGMOD=YES, the last 5 characters of the name of the VTAM module that issued the message are inserted into each VTAM message between the message identifier and the message text.

For example:

If you specify MSGMOD=NO, message IST285I will appear as follows:
- IST285I dumptype DUMP OF resourcename status
If you specify MSGMOD=YES, message IST285I will appear as follows:
- IST285I INFXI dumptype DUMP OF resourcename status
  VTAM module ISTINFXI issued the message.

Note: If you specify MSGMOD=YES, some VTAM messages might be truncated on the right. Significant information might be lost if this occurs.

The MSGMOD start option is described in the z/OS Communications Server: SNA Resource Definition Reference. See z/OS Communications Server: SNA Operation for information on the MODIFY VTAMOPTS and MODIFY MSGMOD commands.