IBM AS/400 manual Running, Differences Between OPM RPG/400 and ILE RPG, Debugging and Exception

Differences Between OPM RPG/400 and ILE RPG

Running

1. The FREE	operation		is	not	supported	by	RPG	IV.
2. Certain	MCH	messages		may	appear in	the	job	log that do not appear
OPM (for example, MCH1202). The appearance of these messages does
indicate	a	change	in	the	behavior	of	the	program.

3.If you use the nonbindable API QMHSNDPM to send messages from your program, you may need to add 1 to the stack offset parameter to presence of the program-entry procedure in the stack. This will only case if the ILE procedure is the user-entry procedure, and if y

special

value

of '*'

for

the

call

message

queue

and a

value

of

gr

the

stack

offset.

4. ILE

RPG

does

not

interpret

return

codes

that are not 0 or 1 for

grams

or

procedures

that

end without

an

exception.

5. When

the

cancel

handler

for

an

ILE

RPG

program

receives

control,

it

the

system

return

code

to

2.

The

cancel

handler

for

an

OPM

RPG

p

does

not

modify

the

setting

of

the

system

return

code.

6.When recursion is detected, OPM RPG/400 displays inquiry message RPG8888. ILE RPG signals escape message RNX8888; no inquiry message is displayed for this condition. Note that this only applies to main pr Recursion is allowed for subprocedures.

7.If decimal-data errors occur during the initialization of a zoned-d packed-decimal subfield, then the reset values (those values use to

subfield

with

the

RESET

operation)

may

not

be

valid.

For

example,

it

that

the

subfield

was

not

initialized,

or that

it was

overlaid

on

subfield

of

a

different

type.

If a RESET operation is attempted

then

in

OPM

RPG/400,

a

decimal-data

error would occur. However, a

RESET

to

the

same

subfield

in ILE

RPG

will complete successfully; after t

the

subfield

has

the

same invalid value. As a

result,

attempts

to

will

get

a

decimal

data

error.

8. In

ILE

RPG,

positions

254-263

of

the

program

status

data structure

contain

the

user

name

of

the

originating

job.

In OPM RPG, these po

reflect

the

current

user

profile.

The

current

user

profile in

ILE

found

in positions

358-367.

Debugging and Exception

Handling

1. The

DEBUG

operation

is not supported in RPG IV.

2. You

cannot

use

RPG

tags, subroutine names, or points

in

the

cycle

*GETIN and *DETC for setting breakpoints when using the ILE source

debugger.

3. Function

checks

are

normally

left

in the job log by

both

OPM

RPG

an

RPG.

However,

in

ILE

RPG, if you

have

coded an

error

indicator,

'E

or

*PSSR

error

routine,

then

the

function check will not appear.

You

should

remove

any

code

that

deletes function

checks,

since the

of

the

indicator,

'E'

extender,

or

*PSSR

will prevent

function

checks

ring.

374 ILE RPG for AS/400 Programmer's Guide