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I have an old RPG III program that has a green screen and displays
messages from a message file in a message subfile at the bottom of the
screen. I need to retrofit the program to provide the option to suppress
the screen so that it can be called from a new Java program. The RPG
program still needs to do its normal validation of the business rules
and, with no user interface displayed, it needs to report back error
messages to the calling program.
The ProgramCall class has a getMessageList function. Is there any way to
load messages into this without crashing the RPG program? Is there a
normal way to accomplish my goal? I can always add program parameters or
use the LDA, but those options will introduce an upper limit on the
number of error messages that I can return.
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