[sumo-user] Lane position not updating after some time

[Branka Mirchevska <brankamircevska@xxxxxxxxx>]

Hi all, 

I have a specific bug that the lane position value for the vehicle I control
remotely via MoveToXY, doesn't update after some (random amount) of time
even though the vehicle clearly moves forward in the gui. 
All other values are further updated (speed, accel etc.) too, only position
[m] stays fixed. 

(Also if you access it in the code it is the same, ti is not a gui problem)

Also here is my Sumo version

Eclipse SUMO Version v1_5_0+1106-f340eb1266
 Build features: Linux-4.15.0-70-generic x86_64 GNU 7.5.0 Release Proj GUI
SWIG GDAL GL2PS Eigen
 Copyright (C) 2001-2020 German Aerospace Center (DLR) and others;
https://sumo.dlr.de

Eclipse SUMO Version v1_5_0+1106-f340eb1266 is part of SUMO.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License v2.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/epl-v20.html
SPDX-License-Identifier: EPL-2.0

Of course I checked also that I am not sending wrong commands via the
MoveToXY function so that is not the reason this happens. 
Even if there was something wrong with my trajectory planning, the
vehicle.LanePosition value comes from Sumo it should be at least compatible
with what the gui shows...
It is probably worth mentioning that if I don't control Ego remotely, this
bug doesn't occur.

As far as I can tell, this happens because of some interaction between the
vehicles at some point in the scenario. (It happens in many very different
scenarios (but not always) and Ego behaviors and it seems impossible to find
the correlation)
For e.g. I had a scenario with Ego and 3 extra cars where lane pos would get
stuck. If I removed each one of the surrounding vehicles one by one, or each
pair of two, and left Ego doing the same decisions, it wouldn't happen.
 Only that exact combination was problematic, and I couldn't pinpoint why.
They were not even close to each-other...

I hope you have some idea what I could try next.

Thanks!

Best,
Branka



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