Retrieving messages from the job message queue.

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I want to count how many times that a message appears in a job log of a
currently running job.  I am trying the following program with no luck.

If I use *PRV it finds no messages.
If I use *EXT instead of *PRV it finds some of the messages.  But not the
ones that I am looking for.

PGM (                                                                +
      &SEARCHMSG       /* Message to count                        */ +
      &MSGCOUNT        /* Count of messages which appeared        */ +
    )

    DCL  &APOS        *CHAR   1  /* Apostrophe                       */
    DCL  &MSGCOUNT    *DEC    3  /* Count of message occurance       */
    DCL  &MSGID       *CHAR   7  /* Message id from stack            */
    DCL  &MSGKEY      *CHAR   4  /* Key of message from stack        */
    DCL  &SEARCHMSG   *CHAR   7  /* Message to count                 */

             CHGVAR     VAR(&APOS) VALUE(X'7D')
             CHGVAR     VAR(&MSGCOUNT) VALUE(0)

    /*     +
     | Position to top of job message queue     +
    */
             RCVMSG     PGMQ(*PRV) MSGQ(*PGMQ) MSGTYPE(*NEXT) MSGKEY(*TOP)
+
                          RMV(*NO) KEYVAR(&MSGKEY) MSGID(&MSGID)
             MONMSG     MSGID(CPF0000) EXEC(GOTO CMDLBL(END))

NEXT:

             IF         (&MSGID=&SEARCHMSG) DO
              CHGVAR &MSGCOUNT VALUE(&MSGCOUNT + 1)
             ENDDO

    /*     +
     | Get next message     +
    */
             RCVMSG     PGMQ(*PRV) MSGQ(*PGMQ) MSGTYPE(*NEXT)
MSGKEY(&MSGKEY) +
                          RMV(*NO) KEYVAR(&MSGKEY) MSGID(&MSGID)
             MONMSG     MSGID(CPF0000) EXEC(GOTO CMDLBL(END))

             GOTO       NEXT
END:

             ENDPGM

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin