I know I should have been practicing, but I couldn't stop fiddling with this problem. By setting the beat resolution to 6 and entering the 16th-triplet notes on subdivisions 1-3 and the eighth-note on 4, I can get BIAB to play the figure correctly. The printout just requires a minor application of Wite-Out to make it conform to standard jazz notation (thanks to Martin for moving my thinking in this direction).

Bob