Explanation
If START appears in the message text, one of the
following occurred:
- The data set was opened to the start of an SL or AL magnetic tape
file. The file sequence number specified (default=1) in the LABEL
parameter of the DD statement is greater than the last file on the
tape volume indicated, which ends with an EOV label. More volume serial
numbers follow.
- The data set was opened for MOD processing to a magnetic tape
file. The volume sequence number specified is less than the last volume
number that the existing data set resides on. More volume serial numbers
follow.
If END appears in the message text, the data set was opened
to the end of an SL or AL magnetic tape file 1. One of the following
error conditions exists:
- The dsname in the HDR1, EOV1, or EOF1 label
was not correct.
- The file sequence number specified (default=1, must be 1 for this
message) in the LABEL parameter of DD statement ddn is less than the
first file on the tape volume indicated by ser.
- A tape mark was read instead of a HDR1 label.
There are more previous volume serial numbers. This usually
occurs when several specific volume serial numbers are specified in
advance for a DISP=MOD data set to use instead of scratch tapes.
In
the message text:
- ddname
- The DD name.
- ser
- The volume serial number.
System action
For START, the open routine permanently increases
the volume sequence number by one and continues processing on the
next volume specified.
For END, the open routine decreases the
working volume sequence number by one and continues processing on
the next volume specified.
Programmer response
To save the time required to do this multivolume
positioning recovery, change the JCL.
For START:
- Specify a volume sequence number in the VOL parameter of the DD
statement, or
- Omit the skipped volume serial numbers, or
- Specify VOL=REF=*.ddname to get only the last volume serial number
of the previous file. This then is the first volume serial number
of this file.
For END: - Specify a volume sequence number in the VOL parameter of the DD
statement, or
- Omit the excess volume serial numbers, or
- Omit all the volume serial numbers. This lets the system assign
scratch volumes as needed instead of you making specific requests.
If you want to rerun the job, analyze and/or modify the
JCL and program to ensure that the job does not accept the wrong tape
because one of the three original error conditions for END may no
longer exist.
Source
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