I've followed the instructions to build a Periodic Custom VI based I/O server with a single continuous voltage acquisition with the cDAQ 9172 acquisition card. I deploy the server but when I try to monitor the variables, eg Ymax, I don't get the proper value, there are no change, Ymax is always null. I've tried to replace the data acquisition with the express simulate signal vi and it works. I put my labview project in attached file. So why the server doesn't update properly the values with the data acquisition ?