FABA3555E "OPEN" FAILED FOR DDNAME DAR12I

Explanation
 OPEN processing failed for the file associated
with the specified DD statement.

System action
 Program FABADA5 issues one of the following messages to describe the error, then ends with an
abend code equal to the message number: 
DD STATEMENT NOT FOUND

FAILED BY OPERATING SYSTEM.

User response
 Make sure that a DD statement is present for
the specified ddname, and that it properly identifies the correct
data set. Correct any errors, and rerun the job.