Message exit user data (MSGUSRDATA)
Specifies user data that is passed to the message exit program.
The possible values are:
- *SYSDFTCHL
- The value of this attribute is taken from the system default channel of the specified type.
- *NONE
- The user data for the message exit program is not specified.
- message-exit-user-data
- Specify a maximum of 32 characters of user data for the message exit program.