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Hi Terri,

Others have responded to say to not make the Data Structure based on a pointer. I just thought I'd expand on that and say that the DS parm is actually only going to pass a pointer under the covers given your code sample. Specifying the parameter keyword Value will pass the entire data structure, otherwise if Value isn't specified (which means either Const or neither Value nor Const are specified), then the parameter is passed by reference (so it passes a pointer).

Hope that helps,
Kurt Anderson

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of THarteau@xxxxxxxxxxxxxxxxxx
Sent: Friday, March 05, 2010 9:30 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: Service Program Pointers

Hi,

I did a service program a few years ago and I trying to do anther. Most of
the stuff is copied from the working one. When I call the program, I am
getting the errors:
Pointer not set for location referenced.
Function check. MCH3601 unmonitored by SRVJBT at statement
0000004100, instruction X'0000'.
The call to JBTPRICE ended in error (C G D F).

JBTPRICE is the module & SRVJBT is the service program. This is from the
compiled JBTPRICE. I used a copy to get the prototype in the program. It
is the only place I use a pointer:
*COPY QPROSRC,PROJBT
D JbtPrice PR N
D JbtPriceDS LikeDS(JbtInfo)

D JbtInfo DS Based(JbtInfoPtr)
D JobIn 6 0
D ItemIn 15
D DateIn 8 0
D PrcOut 15 5

D*JbtInfoPtr S * Inz(%Addr(JbtInfo))
In my program that uses the service program, I copy in the same prototype
and have this to get the price back:
C Eval JbtPriceDS.DateIn = ShipDt
C Eval JbtPriceDS.ItemIn = Item
C Eval JbtPriceDS.JobIn = JLJBT#
C Eval JbtPriceDS.PrcOut = 0
C Eval RtnInd = JbtPrice(JbtPriceDS)
C Eval WrkPrc = JbtPriceDS.PrcOut

These are the values according to the dump:
JBTINFO DS
DATEIN ZONED(8,0) NOT ADDRESSABLE
ITEMIN CHAR(15) NOT ADDRESSABLE
JOBIN ZONED(6,0) NOT ADDRESSABLE
PRCOUT ZONED(15,5) NOT ADDRESSABLE
JBTINFOPTR POINTER SPP:*NULL
JBTPRICEDS DS
DATEIN ZONED(8,0) 20100331.
'F2F0F1F0F0F3F3F1'X
ITEMIN CHAR(15) 'A01B6360 '
VALUE IN HEX 'C1F0F1C2F6F3F6F040404040404040'X

JOBIN ZONED(6,0) 006982.
'F0F0F6F9F8F2'X
PRCOUT ZONED(15,5) 0000000000.00000

I guess I don't know enough about pointers to see anything to point me in
the right direction. Can anyone tell me what my problem is? Thanks!

<===================================================>

Terri Harteau
Felker Brothers Corporation
****************
"Do not follow where the path may lead. Go instead where there is no path
and leave a trail."
Ralph Waldo Emerson

****************




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