Oracle Message NNO-00601 - warning: no forwarders, DEFAULT-FORWARDERS-ONLY mode ignored

ERRORwarning: no forwarders, DEFAULT-FORWARDERS-ONLY mode ignored
CAUSEthe servers configuration enables DEFAULT-FORWARDERS-ONLY mode but the configuration contains no default forwarders. The server ignores the request and continues running.
ACTIONAn internal error not normally visible to the user. Contact Worldwide Customer Support.