Cannot gather lots of data with GETDATA?

I'm running 32-bit MATLAB R2013a on Windows XP with the NI USB-6218.

Here's my code:

ai = analoginput('nidaq', 'Dev2');
ai0 = addchannel(ai, 0);

ai.SampleRate = 1000;
start(ai);
pause(0.2);

for i = 1:1:2000
    data = getdata(ai, 1)
end

delete(ai);

---

So I run the loop 2000 times... If I run it just 1000, everything is fine and dandy. When I try to run it 2000 or more, I get the error:

Error using daq.analoginput_nidaqmx_1_22/getdata

OBJ is not running and no data is available. Use START before calling GETDATA

Does anyone know why this happens and how I can prevent it from happening? Thanks.

[Eleanor Hassan]

Hi Samuel,

Did you ever resolve this issue?

I am having a similar problem.

Best,

Ellie