Dear Jakob,

I just ran my simulation with the fixed version, it works perfectly. Thanks a 
lot for your fast intervention and the fix!


Best regards,

Joel

________________________________
Von: sumo-user <[email protected]> im Auftrag von Jakob Erdmann 
<[email protected]>
Gesendet: Freitag, 3. Dezember 2021 10:19:00
An: Sumo project User discussions
Betreff: Re: [sumo-user] Sumo crashes because of KraussPS car-following model

Thank you for providing the example files.
The crash was caused by a particular road configuration and is now fixed: 
https://github.com/eclipse/sumo/issues/9718
KraussPS was not directly responsible for the crash but it did highlight the 
problem that opposite overtaking did not take slopes into account yet
(now fixed:https://github.com/eclipse/sumo/issues/9719)

I recommend upgrading to the latest development version which contains the fix 
starting tomorrow at 
https://sumo.dlr.de/docs/Downloads.php#sumo_-_latest_development_version

regards,
Jakob

Am Do., 2. Dez. 2021 um 10:40 Uhr schrieb Schaniel Joel 
<[email protected]<mailto:[email protected]>>:

Good morning,


Thank you for the quick response.

I tried to reduce the complexity of the simulation as much as possible. Since 
it is unclear what is causing the problem, I could not reproduce the error with 
a smaller subset of the simulation.

The KraussPS version crashes at 296 seconds.


Best,

Joel

________________________________
Von: sumo-user 
<[email protected]<mailto:[email protected]>> im 
Auftrag von Jakob Erdmann <[email protected]<mailto:[email protected]>>
Gesendet: Mittwoch, 1. Dezember 2021 20:30:11
An: Sumo project User discussions
Betreff: Re: [sumo-user] Sumo crashes because of KraussPS car-following model

It's a bug. Please provide a minimal input example for reproducing the crash.

Am Mi., 1. Dez. 2021 um 16:56 Uhr schrieb Schaniel Joel 
<[email protected]<mailto:[email protected]>>:

Hi everybody,


I work on a network in hilly terrain with very steep roads. Therefore, I 
included elevation data in my network file with --heightmap.geotiff. Netconvert 
generates some warnings in the process, which might be related to the problem:


Warning: 22 total messages of type: Connection '%' has a grade of %%.
Warning: 2280 total messages of type: Edge '%' has a grade of %%.

Here is my first question: Why do these warnings appear, even though 
--geometry.max-grade.fix is activated? Or are these warnings just generated 
before the edges get fixed and I can simply ignore them?


However, I tried to run the simulation with these warnings. I use the 
"KraussPS" car-following model to include the slope impacts on acceleration. 
But when I run it, the simulation (and also sumo itself) crashes always at the 
same simulation step without any error message. (with sumo-gui as well as with 
sumo)

If I run the same simulation with the normal "Krauss" car-following model, the 
simulation runs through without any problems.
If I run the same simulation without elevation data, KraussPS works also fine 
(obviously).
Any idea why this could be?
I tried to understand how the KraussPS car-following works, but I did not 
manage to apprehend it completely, to be honest. From the comments in the code, 
I understand that there are mechanisms in place that prevent vehicles from 
stalling or drastic changes in the vehicle speed.

I work with a Nightly "extra" Build of version 1.11.0 (17.11.21) on Win10.

Thanks a lot for taking the time!

Best regards,
Joel


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