Archived:Error -1073807346: Occurred at NI-RIO - Session or Object Reference Invalid

Updated Jan 23, 2020

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Reported In


  • LabVIEW FPGA Module
  • LabVIEW


  • NI R Series Multifunction RIO
  • NI CompactRIO

Issue Details

I have compiled FPGA code, and I am trying to interface with it from my host. When I use the Open FPGA Reference and Invoke Nodes on my host VI, I get the following error:

Error -1073807346 occurred at
Error occurred at VISA open and NI-RIO. The given session of object reference is invalid.


How can I fix this error and run my FPGA code?


To resolve this, you need to configure a resource for your FPGA device. Follow these steps to resolve the error:

1. Go to the Project Explorer window and right-click on your FPGA device. Select Properties.
3. In the resource field, type in RIO::INSTR.
3. Click OK.

You should now be able to run your FPGA VI without any errors.