Thx to Max Smirnov for all its crazy plugins!
http://moi3d.com/forum/index.php?webtag=MOI&msg=6674.254

You can't subdivide directly this volume! Face(s) with 5 edges!

But you can subdivide the 2 faces! :)

_sSplit must have face(s) or ONE edge selected
Here Edge is not permited... a Face(s) yes!

So...it's quasi real time because functions are shortcuted! ;)