how to debug this error when use file exchange TraCI4Matlab: Java exception occurred

Error using traci.Socket/connect (line 25)

Java exception occurred: 

java.net.ConnectException: Connection refused: connect

  at java.net.DualStackPlainSocketImpl.connect0(Native Method)

  at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)

  at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)

  at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)

  at java.net.AbstractPlainSocketImpl.connect(Unknown Source)

  at java.net.PlainSocketImpl.connect(Unknown Source)

  at java.net.SocksSocketImpl.connect(Unknown Source)

  at java.net.Socket.connect(Unknown Source)

  at java.net.Socket.connect(Unknown Source)

[Walter Roberson]

The contribution appears to be at https://www.mathworks.com/matlabcentral/fileexchange/44805-traci4matlab

[Walter Roberson]

Did you install and start SUMO on your system?

[Juan Alfonso Serrano]

I have the same problem. I have installed SUMO 0.27.1. Does anyone has a solution?

Thanks.

[samar shaikh]

i am facing the same problem do you find the solution regarding this?

thank you