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Notes for the Online Interface Parameters

Follow these steps:

  1. DESTID= specifies an optional CICS destination to which message output is to be written.
  2. SRVTRAN= specifies the service transaction ID.

    This transaction is required for CICS, but you can use the default service transaction name XMC0.

  3. SUBMAX= controls the maximum connections that can be managed by the subtask program.

    The default is 500, which should be changed for most users. Each ISPF/XMS, TSO/XMS, CA Roscoe/XMS, or IMS/DC user connects through the XMS subtask and the value defines the total number of users that can be connected from these interfaces at one time.

  4. USERMAX= controls the maximum connections that can be managed by the subtask program.

    The default is 500. Each CICS region can manage this number of sessions. To increase the value, you must restart the CICS or XMS region that owns the subtask.

  5. WAITCNT= specifies a value that should remain at the default value at this time.

    Major performance problems occur if you set this to a lower value. Note that this value cannot be set above 255.

  6. IMSMENU= specifies the IMS/DC conversational menu to transfer to when CA Deliver ends. If this value is not specified, the SPA TRAN is set to blank upon termination.
  7. IMSSPA= specifies the length of the IMS/DC spa to be used (IMS/DC only).

    This parameter allows the spa size to be adjusted so that CA Deliver can transfer to user transactions.

    IMS/DC requires the spa size to remain the same. The spa size must be at least 18 bytes, and although you can specify a spa size of up to 100 bytes, only the first 18 bytes are used.

  8. XMC11= specifies an optional 4-character CICS transaction ID that is displayed as part of message EBCXMC11 when a CICS user times out.