Providing appropriate tables in your ESS
It is the responsibility of the Db2 for z/OS® user to provide the external subsystem module table, and optionally, the resource translation table in the Db2 for z/OS subsystem.
It is also the user's responsibility to make the names of these tables known to the person who is responsible for defining the IMS PROCLIB data set member entries. The person defining the IMS PROCLIB data set member entries includes the names of these tables as values for the parameters ESMT and RTT, respectively.