Regeneration doesnt stop immediatly when stop called

[SJSimpson]

I have a vi that writes 180 samples to an analog out and regenerates over and over. The problem that I'm having is when I call daqmx stop it doesn't stop immediately. It continues for a few more iterations of the 180 samples. I'm only writing 180 samples to the task once and there is nothing else in the vi. 

[ZYOng]

Please post your code so that we can understand better.

Besides, what is the model of the DAQ device? What is your update rate (sampling rate)?

[SJSimpson]

I'll send code tomorrow and hardware. 

However I'm sampling at 90 samples per second. I'm writing 180 samples so the put put should take 2 seconds.

When I call stop it takes like 4 seconds stop sometimes less sometimes more.