After database for Oracle Application was upgraded to 12c, jobs that use Unicenter Job Management Adaptor for Oracle Applications failed with "ERROR: connection error: 28040".
Workload Automation AE and Unicenter Job Management Adaptor for Oracle Applications 3.0
This is an Oracle issue. The error is the same as ORA-28040.
Add the following in sqlnet.ora on both of the Oracle Server and Client machines: