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Using DAQ occurrence to wait for start trigger

Hi,
 
I'm trying to use digital triggers to start and stop datalogging. Every time start trigger appears, new file is created and data is acquired to file until stop trigger occurs. Now I'm using set DAQ occurrence and wait for occurrence functions to wait for start trigger before creating a new file. The problem is that after first stop trigger this occurrence method doesn't work. I believe it's because AI is not cleared and configured before calling DAQ occurrence again. Number of scans acquired is not zero, if I don't clear and configure AI again? Am I right?
 
Do I have to clear and init AI everytime before occurrence config or is there a better way to make program wait for start trigger?
 
Thanks in advance,
Jakke
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