Hi!
I have been trying to use C++ TraCI and facing some weird issues. I have been 
trying to run the example source code found in 
https://sumo.dlr.de/docs/TraCI/C++TraCIAPI.html with a scenario which works 
fine in individual run.

The code compiles well and ran for the first time. But after that, I was trying 
to run it multiple times and it is not running with the following error message:
        libc++abi.dylib: terminating with uncaught exception of type 
tcpip::SocketException: tcpip::Socket::connect() @ connect: Connection refused 
zsh: abort ./test

Initially, I thought that it might be an issue with port still open, I find the 
PID for the port and kill the process to open the port. But still the same 
error is shown. I have changed the port number (both in source code and command 
line), but still same result.

The most weird part is, While trying several times, for once the code again 
runs with literally no changes and now again it is not running.

I know, the problem may seem weird but any kind of help is appreciated.
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