IEC988I
jjj,sss,ddn{-#},dev,volser,dsn DATA SET NOT UNALLOCATED DURING CLOSE RCxx

Explanation

This is an informational message. FREE=CLOSE was specified in the JCL or in the CLOSE macro but was not honored.

In the message text:
jjj
The job name.
sss
The step name.
ddn[-#]
The DD name and concatenation number if applicable.
dev
The device number.
volser
The volume serial number.
dsn
The data set name.
Return code xx indicates the reason why the data set was not freed:
00
The current task is terminating abnormally and the job step task is not now terminating.
01
Disposition of LEAVE specified.
02
Disposition of REREAD specified.
03
Another DCB in the address space is open to this DD name.
04
The data set is part of a concatenation.

System action

Processing continues.

Operator response

None.

User response

If CLOSE not deallocating the data set causes no problem, this is an informational message and no application change is required. If it does cause a problem, or you want to eliminate the message, correct the application based on the reason for the failure and rerun the job.

Source

DFSMSdfp