MATLAB: Matlab UDP Recieve Error

flightgearMATLABudp

Hi,
I'm running FlightGear simulation software and output some variable data through UDP on the loopback address 127.0.0.1, port 1234. Using the SocketTest application I can see the data being received however I would like to do this through Matlab which is running on the same PC.
I've read through the following example: https://uk.mathworks.com/matlabcentral/answers/10234-recieving-udp-from-iphone
I try to run the following:
    while(1)
         u = udp('localhost',1234,'localport',1234);
         u.InputBufferSize = 1000;
         u.DatagramReceivedFcn = @localReadDatagram;
         fopen(u);
    end
My issue is that I always get the error: "Unsuccessful open: Address already in use: Cannot bind ", can anyone help?
Thanks, Joe

Best Answer

You should probably use a different localport unless the receiving software insists that the transmitting port be 1234 . localport is the port number that data is transmitted from.
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