error in final step of veins tutorial

Question

When I run the command to start SUMO,it prints Listening on port 9999 and starts directly to print also :

Handling connection from 127.0.0.1 on port 63825  
Got  Traci message of length 1347375952  
Got Traci command of length 31  
Got Traci command 0x2f  
Aborting on error:Expected CMD-FILE_SEND(0x75),but got 0x2f  
Closing connection from 127.0.0.1 on port 63825

Connection from 127.0.0.1 on port 63826 Handling connection from 127.0.0.1 on port 63826 Got........

And so one

Instead of waiting for the simulation to start.

And it continues to print the same error message even if I start the simulation or I close the simulation. So the same error message continues to be printed on the command terminal until I close it.

What is wrong? And someone knows how can I fix this problem?

Answer 1

Your system seems to run another program that tries to connect to TCP port 9999. Independent of whether you are running this program knowingly or if it is malware, either shutting down the conflicting program or changing the sumo-launchd.py port number will help. See the sumo-launchd.py documentation for how to change its port number.