Hi There,

I try to DITTO browse a VSAM file with five extents that spans over 2 volumes. 
The first four extents are on the first volume and the last extent on the 
second volume. Paging through the file goes OK until it gets halfway through 
the 4th extent. The messages Positioning Lost and DIT3750I VSAM SHOWCB RC 
'X04', Error Code X'03' appear on the screen. 

Could virtual storage of Ditto be the issue here?


This is a LISTC ENT output of the file:

LISTC ENT(PNGG00.STPACK.STDMC2.D0.RR28800.DATA) ALL
0DATA ---------- PNGG00.STPACK.STDMC2.D0.RR28800.DATA
      IN-CAT --- CATALOG.PRODPLEX.APP.GENL6
      HISTORY
        DATASET-OWNER-----(NULL)     CREATION--------2012.178
        RELEASE----------------2     EXPIRATION------0000.000
        ACCOUNT-INFO-----------------------------------(NULL)
      PROTECTION-PSWD-----(NULL)     RACF----------------(NO)
      ASSOCIATIONS
        CLUSTER--PNGG00.STPACK.STDMC2.D0.RR28800
      ATTRIBUTES
        KEYLEN-----------------0     AVGLRECL-----------28800     
BUFSPACE----------100000     CISIZE-------------30720
        RKP--------------------0     MAXLRECL-----------28800     
EXCPEXIT----------(NULL)     CI/CA-----------------25
        RECORDS/CI-------------1     MAXRECS-------4294967295
        STRIPE-COUNT-----------1
        SHROPTNS(2,3)      SPEED     UNIQUE           NOERASE     NUMBERED      
NOWRITECHK     NOIMBED       NOREPLICAT
        UNORDERED          REUSE     NONSPANNED      EXTENDED     EXT-ADDR
      STATISTICS
        REC-TOTAL---------161675     SPLITS-CI--------------0     
EXCPS-------------177865
        REC-DELETED------------0     SPLITS-CA--------------0     
EXTENTS----------------5
        REC-INSERTED------161652     FREESPACE-%CI----------0     
SYSTEM-TIMESTAMP:
        REC-UPDATED------------0     FREESPACE-%CA----------0          
X'C9C63B8D3788F834'
        REC-RETRIEVED-----323320     FREESPC----------------0
      ALLOCATION
        SPACE-TYPE------CYLINDER     HI-A-RBA------4966656000
        SPACE-PRI------------274     HI-U-RBA------4966656000
        SPACE-SEC------------274
      VOLUME
        VOLSER------------APRD15     PHYREC-SIZE--------10240     
HI-A-RBA------4629504000     EXTENT-NUMBER----------4
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------5     
HI-U-RBA------4629504000     EXTENT-TYPE--------X'40'
        VOLFLAG------------PRIME     TRACKS/CA-------------15
        EXTENTS:
        LOW-CCHH-----X'00F10000'     LOW-RBA----------------0     
TRACKS--------------4110
        HIGH-CCHH----X'0202000E'     HIGH-RBA-------210431999
        LOW-CCHH-----X'03390000'     LOW-RBA--------210432000     
TRACKS--------------4110
        HIGH-CCHH----X'044A000E'     HIGH-RBA-------420863999
        LOW-CCHH-----X'046F0000'     LOW-RBA--------420864000     
TRACKS-------------36990
        HIGH-CCHH----X'0E10000E'     HIGH-RBA------2314751999
        LOW-CCHH-----X'1B590000'     LOW-RBA-------2314752000     
TRACKS-------------45210
        HIGH-CCHH----X'271E000E'     HIGH-RBA------4629503999
      VOLUME
        VOLSER------------APRD10     PHYREC-SIZE--------10240     
HI-A-RBA------4966656000     EXTENT-NUMBER----------1
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------5     
HI-U-RBA------4966656000     EXTENT-TYPE--------X'40'
        VOLFLAG------------PRIME     TRACKS/CA-------------15
        EXTENTS:
        LOW-CCHH-----X'043B0000'     LOW-RBA-------4629504000     
TRACKS--------------6585
        HIGH-CCHH----X'05F1000E'     HIGH-RBA------4966655999
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
1IDCAMS  SYSTEM SERVICES                                           TIME: 
13:02:48        06/26/12     PAGE      2
0       DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
      VOLUME
        VOLSER-----------------*     PHYREC-SIZE------------0     
HI-A-RBA---------------0     EXTENT-NUMBER----------0
        DEVTYPE------X'3010200F'     PHYRECS/TRK------------0     
HI-U-RBA---------------0     EXTENT-TYPE--------X'FF'
        VOLFLAG--------CANDIDATE     TRACKS/CA--------------0
1IDCAMS  SYSTEM SERVICES                                           TIME: 
13:02:48        06/26/12     PAGE      3
0         THE NUMBER OF ENTRIES PROCESSED WAS:
                    AIX -------------------0
                    ALIAS -----------------0
                    CLUSTER ---------------0
                    DATA ------------------1
                    GDG -------------------0
                    INDEX -----------------0
                    NONVSAM ---------------0
                    PAGESPACE -------------0
                    PATH ------------------0
                    SPACE -----------------0
                    USERCATALOG -----------0
                    TAPELIBRARY -----------0
                    TAPEVOLUME ------------0
                    TOTAL -----------------1
0         THE NUMBER OF PROTECTED ENTRIES SUPPRESSED WAS 0
0IDC0001I FUNCTION COMPLETED, HIGHEST CONDITION CODE WAS 0
0        
0IDC0002I IDCAMS PROCESSING COMPLETE. MAXIMUM CONDITION CODE WAS 0    



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