OPNQRYF - ODP Error

I'm receiving the following error within an OPNQRYF command.

CPF4205 - Shared Open not allowed for query.

I have tested the program in a Test environment without any problems
whatsoever however the
above error occurs as soon as the program is processed in the Live
environment, any ideas?


/** Set-up Override For Open Query File **/
OVRDBF     FILE(WHP3530) TOFILE(*LIBL/WHP35) SECURE(*YES) SHARE(*YES)

/** Find Available Active Stock Within the Primary & Secondary Areas **
CHGVAR     VAR(&SEL) VALUE('(CONO35 *EQ "' || &L#CONO || '") *AND +
                            (STRC35 *EQ "' || &A#STRC || '") *AND +
                            (PNUM35 *EQ "' || &W#PNUM || '") *AND +
                            (SAVL35 *GT 0) *AND +
                            (STAT30 *EQ "1") *AND +
                            (AREA30 *EQ "' || &W#PARA || '") +
                            *OR +
                            (CONO35 *EQ "' || &L#CONO || '") *AND +
                            (STRC35 *EQ "' || &A#STRC || '") *AND +
                            (PNUM35 *EQ "' || &W#PNUM || '") *AND +
                            (SAVL35 *GT 0) *AND +
                            (STAT30 *EQ "1") *AND +
                            (AREA30 *EQ "' || &W#SARA || '")')

/** Determine Area Sequencing **/
IF         COND(&W#PARA *GE &W#SARA) THEN(DO)

     /** Process Query By Descending Area **/
     OPNQRYF    FILE((*LIBL/WHP35) (*LIBL/WHP30))  +
                FORMAT(*LIBL/WHP3530) QRYSLT(&SEL) +
                KEYFLD((WHP35/CONO35)              +
                               (WHP35/STRC35)              +
                               (WHP35/PNUM35)              +
                               (WHP35/DTRT35)              +
                               (WHP30/AREA30 *DESCEND)     +
                               (WHP35/LOCN35))             +
                JFLD((WHP35/CONO35 WHP30/CONO30)   +
                         (WHP35/STRC35 WHP30/STRC30)   +
                         (WHP35/LOCN35 WHP30/LOCN30))  +
                         SEQONLY(*NO)
      ENDDO

 ELSE       CMD(DO)

      /** Process Query By Ascending Area **/
OPNQRYF    FILE((*LIBL/WHP35) (*LIBL/WHP30))  +
                FORMAT(*LIBL/WHP3530) QRYSLT(&SEL) +
                KEYFLD((WHP35/CONO35)              +
                               (WHP35/STRC35)              +
                               (WHP35/PNUM35)              +
                               (WHP35/DTRT35)              +
                               (WHP30/AREA30 *ASCEND)     +
                               (WHP35/LOCN35))             +
                JFLD((WHP35/CONO35 WHP30/CONO30)   +
                         (WHP35/STRC35 WHP30/STRC30)   +
                         (WHP35/LOCN35 WHP30/LOCN30))  +
                         SEQONLY(*NO)
      ENDDO

CALL       PGM(WWH495)


CLOF   OPNID(WHP35)
DLTOVR FILE(WHP3530)
RETURN

Thanks in advance
Andy J


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