CECN0084I (0x010C0054) CECN0084I The software could not load the replication environment because the data server could not find the CECSUB DD.

Explanation
The data server was unable to locate a required data set that contains metadata for subscriptions.

User response
Correct the job control language (JCL) for the data server to specify the required CECSUB DD and restart the data server.