If you use APPC communications, you need to create your own APPC controllers and devices. You must ensure that you specify correct remote system information when creating the controller description. For example, the Remote network identifier, Remote Control point, and Remote System Name values relate to the remote system. You must use the QBRM mode for the Mode parameter on the APPC device description. The default for this value is *NETATR, which might use the BLANK mode description.
If you use advanced program-to-program communications (APPC), you also need to change your APPC controller device descriptions if you change the name of your network or the local location name. You must do this because you cannot delete the descriptions and allow the system to automatically create your definitions, as you can in APPN.