In server mode the tranfert abort with message CFTT15E NPART=&part  _ Not found

When a transfer is initiated by a remote partner, XFB Monitor CFT always controls its identity. If the remote sender is not the initial sender, store and forward mode, the XFB Monitor can choose to control the initial sender identity according to CTRLPART parameter.

Exemple CFTPART
                       CTRLPART =ALL

IGNORE (Default value): no control of the remote sender identity.
ALL: control of the remote sender identity. If the partner is unknown, the transfer is rejected with message