ATB277E

Explanation
 To process a SET or START command, the system
tried to process an OPEN macro.  While the system was processing the
OPEN macro, an error occurred.

System action
 If the error occurs while the system is processing
a START command, the system does not process requests that require
side information. If the error occurs while the system is processing
a SET command, the system continues processing with the side information
file it was using before the operator entered the SET command.

Operator response
 Enter the START or SET command again.

System programmer response
 Ensure that the Systems Application Architecture® (SAA) common programming
interface (CPI) communications side information data set specified
in parmlib is correct. 

Module
 ATBDF30

Source
 APPC/MVS

Routing Code
 2

Descriptor Code
 3