Error handling and issuing appropriate messages to the operator play an important role in the programming online applications. The ISPF provides for the fulfillment of this task very good tools. It provides a very good facility for the feedback of errors that occur during the execution of functions. On the other hand, you can very easily use the message output facility of ISPF to inform the user about everything that happens.
The following functions of the ISPF can print out messages:
– From a REXX program using the ISPF command SETMSG.
– From panel by specifying a message ID in plausibility test instructions.
– From the ISPF service commands DISPLAY and TBDISPL.
– Into the ISPF LOG data sets through the ...