If TRAPFWD is already running

You can use the MVS™ MODIFY command to start and stop the trace dynamically. Use of this support is restricted to users with MODIFY command privilege.

If you start the trapfwd from JCL, you have no difficulty knowing the procname. However, if you start the trapfwd from OMVS, the trapfwd generates a message to syslogd. This message indicates the job name the trapfwd is running; this is the job name to specify on the MODIFY command.

For example, assume that the procname is TRAPFWD and you want to change the trace level to 3. You would enter the following:

MODIFY TRAPFWD,trace,level=3

For more information about using the MVS MODIFY command, see z/OS Communications Server: IP System Administrator's Commands.