Explanation
This message is printed for the following reasons:
- A volume without an indexed VTOC indicates no valid free space
information entries exist in the VTOC.
- On a volume without an indexed VTOC, a nonzero return code was
received from OBTAIN because an I/O error occurred, the DSCB was not
found, or an invalid work area pointer was passed to OBTAIN.
- DFSMSdfp passed
a nonzero return code on a volume with an indexed VTOC.
- The DIRF bit is ON; or, on a volume without an indexed VTOC, the
DOS bit is ON.
System action
The entire volume, including unallocated space,
is dumped or copied. The return code is 4.
Operator response
Programmer response
For an I/O error, take the corrective action
suggested at your site. If the DOS bit is on for a volume without
an indexed VTOC, allocate a temporary data set to let DADSM rebuild
the free space information.
Source