Re: [sumo-user] Simpla error (and fix)

[Jakob Erdmann <namdre.sumo@xxxxxxxxx>]

Hi Joerg,

Thanks for reporting this!

The returned value is traci constant INVALID_INT_VALUE which may be returned if the leader vehicle is teleporting or parking (not on a road lane).

I've pushed something similar to your workaround.

best regards,

Jakob

Am Mi., 9. Juni 2021 um 16:53 Uhr schrieb joerg <schweizer.joerg@xxxxxxxxx>:

For those using or developing simpla,

I encountered an error in simpla's _platoonmanager.py file (while using the taxi device, but I also experienced it with a very big scenario without taxis).

Then I discovered that in function def _adviseLanes(self) the state leader.state.laneIX became negative (a large negative number)

Strange that the error actually occurred in a "try" environment.

Anyway the fix (which is really more a workaround) is to replace the line 

traci.vehicle.changeLane(veh.getID(), leader.state.laneIX, self._controlInterval)

with

 ix = leader.state.laneIX
 if ix >= 0:
                          traci.vehicle.changeLane(veh.getID(), ix, self._controlInterval)

No idea why leader.state.laneIX becomes negative, but if there is interest I can provide the scenario.

Best,

Joerg

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