I have been working with Netedit for some times now. But when I perform the simulation on sumo gui all I get everytime is Error: Vehicle '0' has no valid route. No connection between edges 'gneE17' and 'gneE20'. Loading of net-file failed. Quitting (on error) .
Please note here that gneE17 is the ID for the beginning of the route. Also, below find the part code for the traffic data.
<routes>
<vType id="type1" accel="3" decel="1.5" sigma="0.5" length="5" maxspeed="70"/>
<route id="route0" color="1,1,0" edges="gneE17 gneE20 -gneE18 gneE21 "/>
</routes>
<flow id="type1" color="1,1,0" begin="0" end="3600" VehsPerhour="200">
<route edges="gneE17 gneE20 -gneE18 gneE21"/>
</flow>