DFR3705E MSDBCPx IS A DUMMY DATA SET
Explanation
The x is the suffix of the MSDB checkpoint data set. A DUMMY data set was specified for the DD statement.
System action
IMS DEDB Fast Recovery checks other data sets specified in MSDBCPx DD statements, then the job ends with a return code of 16 after displaying message DFR3706E.
User response
Specify the correct data set for the DD statement, and then rerun the job.