Specifies the name of a USS table to be used for VTAM® operator messages and for VTAM operator commands that are
processed through USS. table_name is the
8-character name of a USS table. Choose one of the following USS tables:
- ISTINCNO, which contains the IBM-supplied VTAM messages and commands. ISTINCNO is the default for IBM-supplied VTAM messages. This table can be supplemented with a user-defined message table. When a user-defined USS command table is specified on the USSTAB start option, the user-defined table is the only table searched to process a VTAM command.
- ISTCFCMM contains a master copy of the original messages in ISTINCNO. Choose this table name if you want to continue using these original messages in program operator applications after ISTINCNO is modified. Commands processed through USS continue to use ISTINCNO.
- A user-defined table that contains user-modified messages and commands. Messages not defined in the user-defined table continue to use ISTINCNO; commands not defined in the user-defined table will not be found. The user-defined table should not be named either ISTINCNO or ISTINCDT; otherwise, you might not be able to use all of the defined USS commands and messages.
If the attempt to load the specified table fails, VTAM uses ISTINCNO by default. Message IST116I is issued if the specified table is not found; message IST448I is issued if storage is insufficient for loading the table.