0BB

Explanation
During initialization of a job step or processing
of a START or LOGON command, the initiator issued an ATTACH macro
to attach the job step task, the started task, or the LOGON task.
 The ATTACH failed.

System action
The initiator is abnormally ended causing failure
of the job, START or LOGON.  Register 15 contains the return code
from ATTACH.

Operator response
Retry the command.  If the problem persists,
tell the system programmer.

System programmer response
Search problem reporting data bases
for a fix for the problem. If no fix exists, contact the IBM® Support Center, providing the SVC dump and
the logrec data set error records.

Source
Initiator/terminator