z/OS® Explorer is not SYSPLEX aware, and therefore requires that user-specific components that are started as JCL and are active on the same system the z/OS Explorer client is connected to.
In z/OS 2.1, you can specify
the JOB card to enforce that the job runs on the system it was submitted.
On older systems you must explicitly specify the correct system name
when using a JESPLEX to unite multiple JES subsystems in a SYSPLEX.