Sense code 80140002 received with session activation failure

Problem statement: Session activation failed with the sense code 80140002.
Common symptoms: An attempt to establish a session failed, and the sense code 80140002 (not valid APPN CoS name received) was returned.
Probable cause: The sense code indicates that the APPN CoS definition was not found. The definition might not exist at a node that is performing mode-to-CoS resolution, or the mode-to-CoS mapping specified in the mode table might not be mapping to the intended CoS name.
User response: Examine the mode definition to determine the APPN CoS name. Verify that this definition exists in the VTAMLST members at the nodes that resolve the mode to an APPN Class of Service. Activate the member to be sure that the definition is active. If APPN CoS substitution is enabled (by specifying the APPN CoS start option), verify that the CoS it specifies has been activated.