Sure, the Snort rules are set to update daily.Last update succeeded at 2017-09-28 23:05:13. My FMC shows "2017-09-27-002-vrt " as the current rule update.  

Also getting the same error even though the latest rules are already installed and applied."Snort version is too old. Please apply AC Policy from FMC before attempting upgrade." I'm attempting to update from 6.2.0.2 to 6.2.2-81