ATB281E

Explanation
 To process a SET or START command, the system
tried to open the transaction program (TP) data set.  The TP data
set was not allocated.
 In the message text:  unitname
The logical unit (LU) name.
reason-code
The hexadecimal reason code from dynamic allocation.

System action
 The system does not add or modify the LU in the
system configuration.

Operator response
 After the system programmer corrects the
problem, enter the SET command again.

System programmer response
 Search problem reporting data bases
for a fix for the problem. If no fix exists, contact the IBM® Support Center.

Module
 ATBDF30

Source
 APPC/MVS

Routing Code
 2

Descriptor Code
 3