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Cygnus tutorial - not working

Dear Fiware User, I am trying to complete the example on Cygnus available at http://fiware-cygnus.readthedocs.io/en/latest/cygnus-ngsi/quickstartguide/index.html

I have a working Context Broker available at localhost. However, when I try to run the notification.sh script written according to tutorial, this is the error that I get:

$ ./notification.sh http://localhost:5050/notify

  • About to connect() to localhost port 5050 (#0)

  • Trying ::1... Connection refused

  • Trying Connection refused

  • couldn't connect to host

  • Closing connection #0

curl: (7) couldn't connect to host

Can you please support me? Thak you very much