I utilize the: show ip bgp rib-failure command in IOS to check for BGP learned routes which did not get installed in the routing table.
However, in my Cisco 7009 with Enterprise licensing, I cannot find the equivalent command to check for RIB failures and the reason for the RIB failure.
I've ran into the same issue on IOS-XR code and hasn't been able to find any equivalent in XR docs.
Just wondering if you have found some more information on your NX code?
BR,
Tomas