These specific errors can be received if the CADZSPLn task is shut down or otherwise ends before the CA Dispatch RPO subtask has a chance to finish writing a bundle or report out to the JES queue for print.
Under this circumstance, the bundle that was being written out to JES when the CADZSPLn tasks shutdown occurred would be flagged by CA Dispatch as being an ERROR bundle.
To prevent these messages from being seen again across recycles of the CA Dispatch started task, access the VRDMU820 screen in Dispatch (Option 8.3.1 from the main menu) and check and see if you have any bundles being shown on this screen where the STAT (status) column shows a value of ERROR. If you do, then Dispatch's RPO subtask is not going to be able to write this bundle out to JES for print. So, check and see specifically what reports are in that ERROR bundle and then delete it.
If you know what reports were in it, hopefully you can reprint them from CA Dispatch Online Viewing or ARCHIVE.