eLens: adding checks that r1 and r2 and both greater than 0
eLens: adding checks that r1 and r2 and both greater than 0

SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack