copy paste edit error around FB_Edge_Of_Network_Node.PublishNodeBirth line 22-24.
NBIRTHTopic := WCONCAT( SPARKPLUGB, GroupId);
NBIRTHTopic := WCONCAT( _LastWillTopic, NODE_BIRTH_TOPIC);
NBIRTHTopic := WCONCAT( _LastWillTopic, FW_SLASH);
NBIRTHTopic := WCONCAT( _LastWillTopic, NodeName);
_LastWillTopic should be NBIRTHTopic
Additionally, as NODE_BIRTH_TOPIC := "/NBIRTH/" you don't need the line with FW_SLASH (otherwise it becomes spBv1.0/NBIRTH//myNodeName
Diff:
fixed in v0.0.0.21