Make sure that BiaB is looking in the right place for your styles;
Options/preferences/realtracks.
Do the same for realdrums.

Does this help?

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I'm no longer allowed to go caroling at the psych hospital.
I guess Do You Hear What I Hear was a bad song choice!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware