Index: /LMDZ5/trunk/libf/phylmd/conf_phys_m.F90
===================================================================
--- /LMDZ5/trunk/libf/phylmd/conf_phys_m.F90	(revision 2455)
+++ /LMDZ5/trunk/libf/phylmd/conf_phys_m.F90	(revision 2456)
@@ -2239,4 +2239,14 @@
        END IF
     END IF
+
+    ! Flag_aerosol cannot be to zero if we are in coupled mode for aerosol
+    IF (aerosol_couple .AND. flag_aerosol .eq. 0 ) THEN
+       CALL abort_physic('conf_phys', 'flag_aerosol cannot be to zero if aerosol_couple=y ', 1)
+    ENDIF
+
+    ! flag_aerosol need to be different to zero if ok_cdnc is activated
+    IF (ok_cdnc .AND. flag_aerosol .eq. 0) THEN
+       CALL abort_physic('conf_phys', 'flag_aerosol cannot be to zero if ok_cdnc is activated ', 1)
+    ENDIF
 
     ! ok_cdnc must be set to y if ok_aie is activated