IEB1053I

Explanation
The amount of unused virtual storage in the work
area has just been exhausted. IEBCOPY will try to use a spill data
set to hold what can not be retained in the work area.
Should
the spill data set not be present or be too small or another problem
arise then this message may be the only message to inform you about
what IEBCOPY was doing at the time of failure.
Message inserts
and meanings: in_ddname
input data set DD name.
spill_ddname
spill data set DD name. (normally SYSUT3).

The severity is 0.

System action
IEBCOPY proceeds to open the spill data set.

User response
Look for message IEB1051I which follows later
after successful completion of the current operation.
If message
IEB120I or other data set related messages follow this message then
look for problems related to the spill data set.

Source
DFSMSdfp