This exit is taken during JES2 initialization from the initialization routine (IR) that processes parameter input (IRPL) in HASPIRPL. IRPL is called out of the initialization routine processing loop (IRLOOP) in HASPIRA before most other IRs have been called. Previously executed IRs have processed the initialization options, analyzed the SSI status, and allocated a series of temporary and permanent control blocks. Exit 0 routines, called during initialization options processing, may have allocated installation control blocks that may be used now by Exit 19 routines.

HASPIRPL opens the initialization parameter data set (HASPPARM) and then begins a loop; get an initialization statement from HASPPARM or the operator console or a previous insertion by Exit 19, pass it to Exit 19, log the statement, process the statement using the $SCAN facility if Exit 19 has not indicated it should be deleted. When all input is exhausted, IRPL closes the parameter and log data sets.