DFS891A DDNAME NOT FOUND OR DEVTYPE ERROR
Explanation
An OPEN macro or DEVTYPE macro was issued for the active format data set with a ddname of FORMATA or FORMATB or a DEVTYPE macro was issued with an invalid AREA address.
System action
IMS terminates abnormally with either abend 0889 or abend 0890.
Programmer response
Rerun the job with the correct DD statement.