Yes, I understood and I tried. I build a dll with the FGV. I included it in the wrapper. I ran the VI. I called the FGV but it returns me nothing. Only with VI's, your solution is good, everything is Ok. But, because of the wrapping, there is a problem, maybe I made a mistake. I am trying another solution, I remove the while to make a VI with the inside loop. I must wrap it etc... I hope that values will not be reinitialized in the final program. But I have so many variables that I doubt that it will work.
