Choosing an appropriate value for TCSWAIT

The value that you specify on the TCSWAIT system initialization parameter must be large enough so that under normal circumstances all SNA LUs and connections shut down in an orderly fashion.

To help choose this value, consider using a value slightly larger than the elapsed time between the following two CICS® terminal control shutdown messages:

  DFHZC2305 Termination of VTAM sessions beginning
  DFHZC2316 VTAM ACB is closed

If you do not want a time limit (that is, you assume that all terminals never hang), specify NO for the TCSWAIT system initialization parameter. For more information about this parameter, see TCSWAIT system initialization parameter.

Note: VTAM® is now z/OS® Communications Server for SNA.