You are attempting to create a path between source and target logical subsystems on an IBM model 2105 storage unit over an ESCON connection. The specified port is not available for an ESCON connection. This might be because the port does not exist, because it is not identified as an ESCON port, or because it is already in use.
Use the lsavailpprcport command to list available ports and their types. Specify an available ESCON port, and then resubmit the command.