A0A

Explanation
An error occurred when the system tried to process
an R form of the FREEMAIN macro. A reason code in the SDWACRC field
of the system diagnostic work area (SDWA) explains the error: Code
Explanation
04
The system queue area (SQA) storage to be freed overlaps free
storage.
08
The common service area (CSA) storage to be freed overlaps free
storage.
0C
The local system queue area (LSQA) storage to be freed overlaps
free storage.
10
The private area storage to be freed overlaps free storage.
14
Part of the CSA to be freed is fixed.
18
Part of the private area to be freed is fixed.
1C
The private area to be freed is associated with a data-in-virtual
object.
20
The private area to be freed has been specified on the IARSUBSP
IDENTIFY request, and is eligible to be assigned to a subspace.
24
The task or service request block (SRB) routine tried to free
SQA storage that either overlaps free storage or was obtained by more
than one request.
28
The task or SRB routine tried to free CSA storage that either
overlaps free storage or was obtained by more than one request.

System action
The system issues message IEA705I. The system
abnormally ends the current task.

Programmer response
Do the following: Ensure that the FREEMAIN operands do not specify a different subpool
and/or key than the subpool or key of the storage you are trying to
free.
Ensure that the task control block (TCB) specified on the FREEMAIN
request is the same one specified on the corresponding GETMAIN request.
If a caller running in supervisor state and key 0 made the original
GETMAIN request, ensure that the corresponding FREEMAIN request is
also issued in supervisor state and key 0. If a caller in supervisor
state and key 0 requests storage in subpool 0 or 250, the system satisfies
this request with storage from a different subpool. This situation
is described in z/OS MVS Diagnosis: Reference. 

If the storage is eligible to be assigned to a subspace, make
the storage ineligible by specifying the storage range on an IARSUBSP
UNIDENTIFY request before attempting to release the storage.
Check for program errors that incorrectly modify the FREEMAIN
macro expansion.

Source
Virtual storage manager (VSM)