CDB2TBC

This resource type is used instead of CDB2CONN when CICS is connected to DB2 Version 5 or earlier. The task is waiting for a CICS DB2 subtask to become available. This indicates that the TCBLIMIT value has been reached and that all TCBs are in use and running threads.

You cannot purge the task when it is in this state. Message DFHAP0604 is issued at the console if an attempt to forcepurge the task is made. Forcepurge processing is deferred until a TCB has been acquired.

You can increase the number of TCBs permitted with a SET DB2CONN TCBLIMIT command. If you increase the TCBLIMIT value, CICS posts tasks to retry acquisition of a Db2 subtask.