Additional Information
This error can also occur if you are updating software at the same time that you are trying to update the firmware. You should update the firmware first and then update/install software.
In some cases with NI‑DAQmx 26.1, running NI Measurement & Automation Explorer (NI MAX) as administrator does not resolve firmware update issues for CompactRIO (cRIO) targets. As a workaround, updating the cRIO using a virtual machine (VM) with an earlier version of NI MAX can allow the firmware update process to proceed successfully. After the intermediate update, the target can then be updated to the latest firmware version using NI MAX 26.1.