IBM manual Returning from a Subprocedure, Without, For the AS/400 Reference

Returning from a Called Program or Procedure

¹	All	files	that are open are closed.
¹	Any	data	areas		locked by the procedure are	unlocked.
¹	If	the	main	procedure ended because of a		cancel reply to an in
	then it was a function check that caused the					abnormal		end.		In	thi
	function check is percolated to the caller. If it ended								because
	routine ending with '*CANCL', then escape message					RNX9001	is	issued
	directly		to	the caller. Otherwise the caller		will see		whatever			exc
	the	abnormal		end.
On	the next		call		to the procedure, a fresh copy is		available			for	p
more information				on	exception handlers, see “Using	RPG-Specific			Handlers”
page		226.)

Returning

without

Ending

A

main

procedure

can return

control

to

the calling

procedure

without

en

none of

the

LR

or H1

through

H9

indicators

are

on and one

of the

f

¹

The

RETURN

operation

(with

a

blank

factor

2)

is

processed.

¹ The RT indicator is on and control reaches the *GETIN part of the in which case control returns immediately to the calling procedure. (

information			on	the	RT	indicator,ILE seeRPG	forthe AS/400 Reference)
If	you	call	a	main procedure and it returns without ending, when you
dure	again,		all	fields,		indicators, and	files in the procedure will	ho
they	did	when		you	left	the procedure. However, there are three		e

¹This is not true if the program is running in a *NEW activation group

activation		group is		deleted when the program returns. In that case
time	you	call	your	program will be the same as if	you	had	ended
¹ If	you	are	sharing	files, the state of the file	may	be	differ
held	when	you	left	the procedure.

¹If another procedure in the same module was called in between, th results are unpredictable.

You can use either the RETURN			operation (with a blank factor 2) or
cator in conjunction with the LR			indicator	and the	H1	through		H9	indic
aware of the testing sequence			in the RPG	program	cycle		for	the	RETU
tion, the	RT	indicator, and the	H1 through H9 indicators. A					return will
if the LR indicator or any of			the halt	indicators	is	on	and either
conditions	is	true:

¹ A RETURN operation is done

¹The RT would cause a return without an end

Returning from a Subprocedure

A subprocedure returns normallywhen a RETURN operation is performed suc- cessfully or when the last statement in the procedure (not a RETURN o

processed.		However,	other	than	the removal	of	the	subprocedure	from
stack	no termination actions			are	performed	until	the	main procedure	of
ends. In other words, all				the actions listed for the normal end of a
take	placeonly	for the	main	procedure.

154 ILE RPG for AS/400 Programmer's Guide