For a new cRIO chassis, try compiling a blank FPGA VI in your project, and then run it once interactively. The 9862 should load and appear in MAX automatically and remain there until you run something else on the FPGA. During this time, the 9862 will be usable with XNET in your Real-Time code.If the issue is occurring when running LabVIEW code, to prevent the issue ensure that you are only running the FPGA VI that was compiled with the 9862 module(s) in your LabVIEW project. Then make sure that you aren't closing the FPGA VI reference in your Real-Time code while you are using the NI-9862.
Because the drivers are built in to the compiled FPGA bitfile, they are only loaded when the FPGA bitfile is deployed and ran once on the FPGA (interactively). The FPGA VI itself does not have to remain "running" for the drivers to remain loaded and usable. Compiling a blank FPGA VI that does nothing will work fine to load the drivers.Another possible cause of this issue is if you use a "Close FPGA VI Reference" or "FPGA Reset" method in your Real-Time code. This will cause the drivers to unload and the interface will disappear from MAX and no longer be usable with XNET.
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