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Warehouse warning in topological navigation

Greetings, I am running move_base_topo_stage.launch from package topological_roadmap in ROS Diamondback. I am getting following warning?

[WARN] [WallTime: 1333045061.806064] [56.700000] Could not process inbound connection: [/warehouse] is not a publisher of [/warehouse/graph_mapping/scans/messages_349]. Topics are [['/rosout', 'rosgraph_msgs/Log'], ['/warehouse/graph_mapping/constraint_graph/notify', 'warehouse/UpdateNotification'], ['/warehouse/graph_mapping/scan_match_constraints_next_node/notify', 'warehouse/UpdateNotification'], ['/warehouse/graph_mapping/scan_match_constraints_prev_node/notify', 'warehouse/UpdateNotification'], ['/warehouse/graph_mapping/fixed_frame_poses/notify', 'warehouse/UpdateNotification'], ['/warehouse/graph_mapping/scans/notify', 'warehouse/UpdateNotification'], ['/warehouse/topological_navigation/grids/notify', 'warehouse/UpdateNotification']]{'topic': '/warehouse/graph_mapping/scans/messages_349', 'tcp_nodelay': '0', 'md5sum': 'a4d676ce9bf4274df95bd1940071f796', 'type': 'laser_slam/LocalizedScan', 'callerid': '/cloud_snapshotter'}

These keep happening after some interval. What does these mean? shall I be concerned? Here is rxgraph dot file http://www.mediafire.com/?tlpc9mnwachph35

thanks