Why am I receiving an Oracle REP-50503 no server found in the network when I do a rwdiag -findAll

Hi Guys,

Why am I receiving an Oracle REP-50503 no server found in the network when I do a rwdiag -findAll 

\app\oracle\Middleware\Oracle_Home\user_projects\domains\tag\reports\bin>rwdiag -findAll

Reading the rwnetwork.conf from :\app\oracle\Middleware\Oracle_Home\user_projects\domains\tag\config\fmwconfig\components\ReportsToolsComponent\jims_reptool_d1\rwnetwork.conf

Broadcast mechanism used to locate servers

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Channel address = 228.5.6.7

Channel port  = 14021

REP-50503 No server found in the network