Reading CAN with cRIO

I m launch an app to read a module CAN with the NI 9853 and NI 9852 Modules, but I m having a problem to transfer the information to the real time. I did this VI to transfer the information of CAN in a FIFO in the FPGA module:

I see in my probes ("Mod2/CAN0" and "Mod1/CAN0") that the information is being read. So I did this VI in RT to read and display the information:

But when I SPEAR the doesn´t information system appear in "Data". Information flash sometimes but allmost all the time there is no information 'Data', and when the information is read to reload after a few seconds. Any ideas?

CAN0 and CAN1 is powered differently. Have you taken that matters to your wiring? I think that CAN0 is supplied with internal pay-per-view OR, but CAN1 must be fed outdoors. In addition, the 9853 and 9852 work at different speeds. Have you taken into account?

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