ALTERNATE maps need to maintain the same date-time stamp as the original map. If you need to add a new field to existing original and alternate maps, how do you do so without generating a different date-time stamp on the alternate map?
Release: All supported releases.
Component: Mapping.
If you simply copy the original map again after having added the new field, then you have to re-edit all of the literal fields which were most likely already edited.
If you add the field to the alternate map independently, this is a critical time change and you will generate a different date-time stamp on the alternate map, and so the dialog will fail at run-time.
The solution is to do the second of the above options, and then use the DATETIME option in RHDCMPUT to de-compile the map:-
//SYSIPT DD *
PROCESS=DECOMPILE,DATETIME=YES
MAP=IJHNIECT,VERSION=1