DFS4337E THE IMS DIRECTORY DATA SET CANNOT BE FOUND.
Explanation
During the startup of an online IMS system or a batch job, IMS or the batch job could not find the directory data set of the IMS catalog. Either the directory data set was not created yet or it cannot be found for some other reason.
System action
IMS startup terminates with abend U0071. Batch jobs terminate with abend U0821.
System programmer response
Determine why the directory data set was not found.
If the directory data set is not created yet, create it by running the IMS Catalog Populate utility (DFS3PU00).