RIB failure in bgp ??

hi all

what is RIB failure in BGP . the below show command is showing rib failure .
how does it cause ? how can we avoid it ?

R2#sb
BGP table version is 8, local router ID is 24.0.0.2
Status codes: s suppressed, d damped, h history, * valid, > best, i -
internal,
              r RIB-failure, S Stale
Origin codes: i - IGP, e - EGP, ? - incomplete

   Network Next Hop Metric LocPrf Weight Path
r> 24.0.0.0/24 24.0.0.4 0 0 400 i
r> 45.0.0.0/24 24.0.0.4 0 0 400 i
*> 150.1.3.0/24 24.0.0.4 0 400 300 i

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Received on Thu Apr 14 2011 - 11:34:31 ART