eyetribe_init stuck

[whenst]

Hello,

I'm running Matlab 2015b, on OS X 10.11. eyetribe_init gets stuck at this point and I'm not sure why...

Operation terminated by user during instrument/get (line 77) In instrument/subsref (line 117) result = get(indexObj, prop1); In eyetribe_send_command (line 22) if connection.BytesAvailable > 0 In eyetribe_init (line 23) message = eyetribe_send_command(connection, 'Hi, this is Matlab!');

Any ideas?

Thanks

[whenst]

Update: The problem was that the port was already in use. If I changed the port it works. So, here's my question: How do I close the port if I exit my Matlab script prematurely? (i.e., before I can run close_connection in my script)

Thanks

[whenst]

Update #2: I tried changing the socket option to allow it to use a socket before the default wait time had expired. I added sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) to the EyeTribe_Matlab_server.py script. But this did not work, although it should. I was still getting "Address already in use" error. As a work around I added the following...

while True:
    try:
        sock.bind((MLIP,MLPORT))
    except socket.error as exc:
        if exc.args[0] != 48:
            raise
        print 'Port', MLPORT, 'already in use'
        MLPORT += 1
        print 'Trying port', MLPORT
    else:
        break

Then I edited the eye tribe_init script to accept this port number as an input (manually). I.e.,

MyMatlabScript(portnumber) [success,connection] = eye tribe_init('test', portnum);

This isn't ideal, but I wasn't able to figure out how, using the system function in Matlab, I could retrieve the port number from the python script. Any ideas about this would be very helpful!

Thanks

[whenst]

Update # 3: My new idea, again not ideal, is to have the python script generate a txt file with the port number that works, which is then read by eyetribe_init.m. This way at least you don't have to manually enter the port number into eyetribe_init.

Ideally, I could get sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) to work. But so far I've had no luck. I've not investigated why, I'm not experienced in python, so hopefully someone who is will be able to help!

Thanks

[esdalmaijer]

Thanks for flagging this up, and for your work in narrowing down the issue! Will have a look at your initial solution, which I think is the most elegant. Hope we can find out why it doesn't work as expected.