Index: trunk/MESOSCALE/LMD_MM_MARS/SRC/WRFV2/dyn_em/solve_em.F
===================================================================
--- trunk/MESOSCALE/LMD_MM_MARS/SRC/WRFV2/dyn_em/solve_em.F	(revision 481)
+++ trunk/MESOSCALE/LMD_MM_MARS/SRC/WRFV2/dyn_em/solve_em.F	(revision 485)
@@ -2709,5 +2709,5 @@
 ! .OR. ( (config_flags%mars .eq. 11) .AND. (is .EQ. 2) ) &    !! 11  pass only water vapor
  .OR. (  config_flags%mars .eq. 11                    ) &    !! 11  pass EVERYTHING
- .OR. (  config_flags%mars .eq. 12                    ) &    !! 12  pass EVERYTHING
+ .OR. (  (config_flags%mars .eq. 12) .AND. (is .LE. 5) ) &    !! 12  pass EVERYTHING except 2 ccn tracers
  .OR. config_flags%nested ) THEN                             !! *   pass all tracers if nested
          CALL relax_bdy_scalar ( scalar_tend(ims,kms,jms,is),            &
@@ -2770,5 +2770,6 @@
 !IF (      ((config_flags%mars .eq. 1 ) .and. (is .ne. 2))  &   
 !     .OR. ((config_flags%mars .eq. 11) .and. (is .ne. 2))  ) THEN
-IF ( config_flags%mars .gt. 50 ) THEN
+IF  ( ((config_flags%mars .eq. 12 ) .and. (is .ge. 6)) &
+      .OR. ( config_flags%mars .gt. 50 ) ) THEN
 
      !!! YOU HAVE TO ADD A CONDITION HERE IF YOU ADD A mars OPTION in REGISTRY  !!!
Index: trunk/MESOSCALE/LMD_MM_MARS/SRC/WRFV2/phys/module_lmd_driver.F
===================================================================
--- trunk/MESOSCALE/LMD_MM_MARS/SRC/WRFV2/phys/module_lmd_driver.F	(revision 481)
+++ trunk/MESOSCALE/LMD_MM_MARS/SRC/WRFV2/phys/module_lmd_driver.F	(revision 485)
@@ -927,8 +927,16 @@
     CASE(3)
     qsurf_val(:)=0.                !!! temporaire, a definir            
-    CASE(11-12) 
+    CASE(11) 
     qsurf_val(1)=0.
     qsurf_val(2)=MARS_WICE(i,j)    !! logique avec wtnom(2) = 'h2o_ice' defini ci-dessus
     qsurf_val(3)=0.                !! not coupled with lifting for the moment [non remobilise]
+    qsurf_val(4)=0.
+    CASE(12)    
+    qsurf_val(1)=0.
+    qsurf_val(2)=MARS_WICE(i,j)    !! logique avec wtnom(2) = 'h2o_ice' defini ci-dessus
+    qsurf_val(3)=0.                !! not coupled with lifting for the moment [non remobilise]
+    qsurf_val(4)=0.
+    qsurf_val(5)=0.
+    qsurf_val(6)=0.
     CASE(20)
     qsurf_val(:)=0.