DAQ with NI board: Matlab & Win64

Question

In a moment of uninformed arrogance, I decided that my new data acquisition computer is going to be an x64 running win7. I have matlab 2012a running on the computer and a NI PCIe6363 card doing the data acq. My question is about the new daq.Session interface and how to collect data in the background(a critical component of my experiments).

I am including some example code. I will try and explain what I thought the code is expected to do. And what actually happens....

Code:

function runSessionDAQ
s = daq.createSession ('ni'); s.addAnalogInputChannel('Dev1', 0, 'Voltage');
s.IsContinuous = true; s.Rate = 10000;
timeDuration = 5;
s.NotifyWhenDataAvailableExceeds = s.Rate*timeDuration-1; %trigger 'DataAvailable' before the last sample is collected
lh = s.addlistener('DataAvailable', @(src,events)collectAndSaveData(src,events));

function collectAndSaveData(src,event)
    fprintf('here\n');
    t = event.TimeStamps; data = event.Data;
    save('C:\Users\ephys-data\Desktop\data.mat','t','data');
end

tic;
startT = toc;
stopT = startT+timeDuration;
stop = false;
s.startBackground();
while ~stop
    if toc>stopT;
        stop = true;
        s.ScansAcquired
        s.stop();
        fprintf('stopping....\n');
    else
        if s.ScansAcquired == 0
%             keyboard
        end
        fprintf('continuing...\n')
    end
    WaitSecs(0.5);
end
delete(lh);
end

Expected function: Continuously log data from the card for about 5 seconds. Just before the last few data points are scanned, save the data in an appropriate location. Then stop the acquisition.

Actual result:

>>runSessionDAQ
continuing...
continuing...
continuing...
continuing...
continuing...
continuing...
continuing...
continuing...
continuing...
continuing...

ans =

                0

stopping....

No data is stored in the appropriate location. Actually claims that number of ScansAcquired is zero. And just stops.

What is happening? How should I design my listener?

=========

\begin{rant}

I can't believe how poorly documented the matlab website is for the session based DAQ. And no timed Digital I/O? Sheesh!

\end{rant}

=========

-bas