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Why Do I Receive an Enumeration Error?

Last Modified: May 14, 2020

If you are using a desktop computer with the NI-USRP instrument driver installed, it is possible that there is a compatibility issue between your computer and the PCIe card. Complete the following steps to confirm this issue and resolve it.
  1. Navigate to Start» Device Manager to confirm the issue by verifying that PCI Data Acquisition and Signal Processing Device/Controller appears in Device Manager and that your USRP device does not. If you cannot confirm this, then the issue is not likely caused by a compatibility problem between your computer and the PCIe card. Contact NI or visit
  2. Install the latest BIOS Compatibility software.
  3. Restart your computer.
  4. Complete the steps appropriate for your installed ADE to verify the device connection. Repeat step 1 and observe if the outcome has changed. If you still receive an Enumeration Error, continue to step 5.
  5. Power off your computer and remove the MXI card.
  6. Toggle switch 1.
  7. Reinstall the MXI card and power on your computer.
  8. Repeat step 4. If nothing has changed, continue to step 7.
  9. Uninstall the BIOS Compatibility software. Restart your computer.
  10. Repeat step 4.

If trouble persists, contact NI or visit

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