Exception-initiated monitoring without MPFLSTxx functions

If it is inconvenient to use MPFLSTxx events to trigger your GUI connections, an alternate "fast path" method can be implemented with little effort:

In procedure ERBR3WFX, modify the statement:

SELECT PGM(ERBCSWTO) PARM(wtomsg)

with the name of your own module (for example, FRMFCSC):

SELECT PGM(FRMFCSC) PARM(ERBCSGUI)

Module FRMFCSC builds up an internal buffer with the command string:

F RMFCSC,EX:ERBCSGUI

Afterwards, the command string is passed to the system command interface SVC34 (MGCR macro) for execution. In doing so, module FRMFCSC (instead of ERBCSACT) forces the RMFCSC tasks to initiate the PWS connections. Thus, Scenario II can easily be adapted to work without involvement of MPFLST functions and members.