Stephane:
We will be releasing HEC-RAS 3.1 support with RiverCAD XP (and AutoCAD RMS XP) about mid to late October.
The Army Corps has a ways to go to get HEC-RAS 3.1 released. They are stating that they will need at least a couple of more months of testing and fixing. There is NO beta testing program for HEC-RAS 3.1 (unfortunately).
Sincerely,
Chris E. Maeder, M.S.
Senior Technical Engineer
chris.maeder@bossintl.com