Re: CICS Problem

Hi, Jim,

Actually, I suspect many of my questions are very basic. I'm struggling
to
deal with the DFHCOMMAREA, and trying to understand why it's behaving the
way it does.

For instance, the primary function of the screen I'm building is to read a
VSAM file sequentially, and find all records with the same employer
account
number. They'll be displayed in descending order. When the account
number
changes, I stop displaying the data.

Thus, I use a Startbr, Readnext process to read through the file. This
works perfectly when moving forward. With each press of the Scroll
Forward
key, a new screen of records is displayed.

For debugging purposes, I display the account number, and the first and
last
key that are on the screen on the bottom line of the screen, to prove that
these values are being stored in the DFHCOMMAREA. They are as I move
forward through the file.

The problem occurs when I press the key to start scrolling backward. At
that point, the account number is replaced by spaces. I know why this
happens, because I write it to the DFHCOMMAREA each time I execute a
successful startbr, and the program is failing on the STARTBR when going
backward.

In addition, the first key on the screen, the one I'll need to use to
start
the browse backward, seems to become corrupted. The first four characters
of the 24-byte key are replaced by spaces, and the fifth by a B, though I
have no idea where that comes from, since the key is entirely numeric,
though it's stored in an alphanumeric field.

Because this key is now invalid, when it's used in the STARTBR operation,
the start browse fails.

Yet just before I pressed the Scroll back key, that key was displayed
properly on the screen, so I have no idea what happened to it.

The code for the Scroll backward process follows:

00136 IF EIBAID = DFHPF3
00137 PERFORM 7100-CLEAR-SCREEN THRU 7100-EXIT
00138 MOVE ACEMPNOI TO E-NUMBER ESD-EMP-ACCT-NO
00139 MOVE 0 TO E-SEQ
00140 PERFORM 1000-LOAD-BROWSE-KEY THRU 1000-EXIT
00141 PERFORM 1070-READ-EAFILE THRU 1070-EXIT
00142 SET ACMAP-CTR TO 12
00143 PERFORM 1111-START-BROWSE THRU 1111-EXIT
000144 PERFORM 1250-READ-PREV THRU 1250-EXIT
00145 UNTIL (ACMAP-CTR < 01)
00146 OR (RP-RESP = 20)
00147 OR (AC-EMPLOYER-ID < ACEMPNOI)
00148 PERFORM 1350-END-BROWSE THRU 1350-EXIT
00149 IF WS-AC-SSN1(1) NUMERIC
00150 MOVE WS-MSG04 TO ACERRO
00151 MOVE -1 TO ACEMPNOL
00152 PERFORM 7900-SEND-MAP-RETURN THRU 7900-EXIT
00153 ELSE
00154 PERFORM 7100-CLEAR-SCREEN THRU 7100-EXIT
00155 MOVE 0 TO AC-KEY
00156 MOVE ACEMPNOI TO AC-EMPLOYER-ID ESD-EMP-ACCT-NO
00157 MOVE ACEMPNOI TO E-NUMBER
00158 MOVE 0 TO E-SEQ
00159 SET ACMAP-CTR TO 1
00160 PERFORM 1070-READ-EAFILE THRU 1070-EXIT
00161 PERFORM 1100-START-BROWSE THRU 1100-EXIT
00162 PERFORM 1150-READ-NEXT THRU 1150-EXIT
00163 UNTIL (ACMAP-CTR > 12)
00164 OR (RN-RESP = 20)
00165 OR (AC-EMPLOYER-ID > ACEMPNOI)
00166 PERFORM 1350-END-BROWSE THRU 1350-EXIT
00167 MOVE WS-MSG05 TO ACERRO
00168 MOVE -1 TO ACEMPNOL
00169 PERFORM 7900-SEND-MAP-RETURN THRU 7900-EXIT.

...

00196 1000-LOAD-BROWSE-KEY.
000197 MOVE WS-COMM-FIRST TO AC-KEY.
00198 1000-EXIT. EXIT.

*** And this is where it fails ...

00284 1111-START-BROWSE.
00285 MOVE SPACES TO WS-COMM-BEGIN.
00286 EXEC CICS STARTBR
00287 DATASET('ACCOUNT')
00288 RIDFLD(AC-KEY)
00289 EQUAL
00290 RESP(BP-RESP)
00291 END-EXEC.
000292
000293 IF BP-RESP = DFHRESP(NORMAL)
00294 MOVE ACEMPNOI TO WS-COMM-BEGIN
00295 GO TO 1111-EXIT.
00296
00297 IF BP-RESP = DFHRESP(NOTFND)
00298 MOVE WS-MSG25 TO ACERRO
00299 MOVE -1 TO ACEMPNOL
00300 MOVE U-A-D-M TO ACEMPNOA
00301 PERFORM 7900-SEND-MAP-RETURN THRU 7900-EXIT
00302 ELSE
*** It always stops here, with a Resp of 16, INVREQ.

000303 PERFORM 7100-CLEAR-SCREEN THRU 7100-EXIT
00304 MOVE WS-MSG12 TO ACERRO
00305 MOVE -1 TO ACEMPNOL
00306 PERFORM 7900-SEND-MAP-RETURN THRU 7900-EXIT.
00307 1111-EXIT. EXIT.

-----Original Message-----
From: cobol400-l-bounces@xxxxxxxxxxxx
[mailto:cobol400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim Essinger
Sent: Saturday, February 02, 2008 3:28 PM
To: COBOL Programming on the iSeries/AS400
Subject: Re: [COBOL400-L] CICS Problem

Lora,

I think your questions are just fine here, as long as you realize that
there
may be some differences between i5/OS COBOL (even the CICS version) and
what
you are doing on a mainframe. What we have to offer may or may not help.
Ask away, and if we can, we will answer to the best of our knowledge.

Jim