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I have successfully installed Veins (v5.1), SUMO (v1.9.1) and OMNeT++ (v5.6.2) in macOS Big Sur. OMNeT++ and SUMO work perfectly when running alone. Also the erlangen example ends correctly when launching "sumo-gui -c erlangen.s.sumo.cfg"

However, when I try to run the Veins demo scenario, I get the following error by SUMO:

"Error:Storage::readChar():invalid position".

The veins_launchd listens correctly on port 9999, SUMO loads successfully all the configuration files, but upon starting the simulation it terminates with the above error (also reported here).

Any suggestions how to fix it?

Thanks.

elebo
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You will need to upgrade SUMO to at least SUMO 1.9.2 or downgrade SUMO to SUMO 1.8.

SUMO 1.9.1 had a bug that broke TraCI functionality. More details are available on https://github.com/eclipse/sumo/pull/8601

user16145613
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    Thank you for your suggestion. Everything runs perfectly after upgrading SUMO to v1.9.2. Thank you again! – elebo Jun 08 '21 at 10:53