I ran a focus program in mainframes using JCL with 90000 records in the input file.
The record length on input file is 95. The DISP parameters for the output file was gives as follows -
DISP=(NEW,CATLG),SPACE=(CYL,(50,10)),UNIT=SYSDA.
The output file has been created for all the data but the job is not getting completed but getting ABENDED.
It is giving an error code of U0602.
How to eliminate this error.

manash,

This is what I found on the internet:

    FDR124  FORMAT 4 ERROR REASON=n
  
            Reason: FDR detected an error with the Format 4 DSCB.
                    The VTOC may be improperly formatted.
  
            REASON CODE               EXPLANATION
            1 -- More than one (1) Format 4 was found, or the
                 first entry in the VTOC was not a Format 4. This
                 may be due to an IBM problem.
            2 -- FDR found the Format 4 contained zero (0) free
                 DSCB's plus the high water mark was set to the
                 first
                 Format 5.
                 This is the condition in which CPK would leave
                 the volume if an ABEND or system crash occurred
                 during the restore phase. This volume may be
                 partially restored. This is a very serious
                 problem. The volume should be placed offline
                 until the error is corrected. See Section 40.23
                 on a procedure to recover the volume. If you must
                 dump the volume, specify PROT=NONE on the DUMP
                 TYPE= command.
            Action: A U0602 Abend will be issued. Contact
                    INNOVATION for assistance with an
                    IEHLIST LISTVTOC DUMP listing.

I would suggest you contact your systems people!

Hi Manash,
In general a U602 abend indicates an issue with a file.
Below are some possible causes of this abend:

A partitioned dataset was allocated instead of a physical sequential dataset.
(A -WRITE was executed against a partitioned dataset instead of a physical sequential dataset).
A FOCUS workfile, like FOCSTACK, was allocated to a partitioned dataset instead of a sequential dataset.
A Dynam FREE was executed against a load module that had already been freed.
The wrong load libraries are allocated to a job.
If none of these help, open a ticket with IBI.
Regards,
Rich

quote:

UNIT=SYSDA.

Manesh:

Some type of I/O error is occurring. Some IBM sites limit use of SYSDA in BATCH JOBs and system management may be flagging as a user error since it may be requiring the output to be on a permanent device (like PRDDA or TSTDA -check with your site on the names used there).

It would help if you posted the DDs from the JCL for both the input and output datasets, and used "XXX.yyy..zzz" etc. to keep the dataset names confidential. If your DD is not accurate, the OS will assume a file type that you may not want.

Don't use the mainframe any more, and yes concur with all the others, do you have your DCB coded in the JCL stream? This may be where your issue really lies.

Thanx to u all for your suggestions. Will try to figure it out.