RE: return indicator

Return Indicator (RT)
You can use the return indicator (RT) to indicate to the internal RPG logic
that control should be returned to the calling program. The test to
determine if RT is on is made after the test for the status of LR and before
the next record is read. If RT is on, control returns to the calling
program. RT is set off when the program is called again.
Because the status of the RT indicator is checked after the halt indicators
(H1 through H9) and LR indicator are tested, the status of the halt
indicators or the LR indicator takes precedence over the status of the RT
indicator. If both a halt indicator and the RT indicator are on, the halt
indicator takes precedence. If both the LR indicator and RT indicator are
on, the program ends normally.
RT can be set on as a record identifying indicator, a resulting indicator,
or a field indicator. It can then be used as a conditioning indicator for
calculation or output operations.
...

RETURN (Return to Caller)
The RETURN operation causes a return to the caller....
... When a program or main procedure returns, the following occurs:
1.      The halt indicators are checked. If a halt indicator is on, the
procedure ends abnormally. (All open files are closed, an error return code
is set to indicate to the calling routine that the procedure has ended
abnormally, and control returns to the calling routine.)
2.      If no halt indicators are on, the LR indicator is checked. If LR is
on, the program ends normally. (Locked data area structures, arrays, and
tables are written, and external indicators are reset.
3.      If no halt indicator is on and LR in not on, the procedure returns
to the calling routine. Data is preserved for the next time the procedure is
run. Files and data areas are not written out. 
...

So, in a broad sense, the answer to your question is yes. 

        
        We're looking at an RPG pgm written in 1983.  Before the pgm returns
to its
        caller, it sets on the RT indicator.  Is this functionally
equivalent to
        using the RETURN op code?  Thanks.

        
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