File requirements for DDM
Before remote files can be accessed by a System i® product, distributed data management (DDM) files must be created on the client system.
At the time a DDM file is used, the device (remote location name) and mode (APPC session characteristics) specified in the DDM file must also exist on the system if APPN is not used. If APPN is used, then the device does not need to exist on the system. However, the system identified by the remote location name must exist within the APPN network. The APPN parameter on the Create Controller Description (APPC) (CRTCTLAPPC) and the Create Controller Description (SNA Host) (CRTCTLHOST) commands controls whether APPN is used.