Thank you first of all for your answer
In fact can I use GPCTR_Control with my card, but I would like to start both counters together, at the same time. So when I put the string "0,1" in the counter list input parameter of GPCTR_Control, Labview returns me an error. If I put only "0" or "1", all is ok...
So which is the best solution to start together two output signals I configured before.
thanks
Nicolas