HPSR3901E OPEN FAILED FOR DDNAME: `ddname`

Explanation
 After an OPEN macro was issued to open the non-VSAM
data set that is associated with ddname, DCBOFLGS
was not zero.

System action
 Processing stops.

User response
 Ensure that the DD statement associated with ddname indicates
the correct data set. Correct the error and rerun the job.