If {TAIL ~ a connection} from {HEAD ~ User PC} 20 to Weather Server 26 cannot be established, the path becomes red 
If { TAIL ~ a connection } from { HEAD ~ User PC } 20 to Weather Server 26 can not be established , the path becomes red
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH