Index: LMDZ.3.3/trunk/libf/dyn3d/addfi.F
===================================================================
--- LMDZ.3.3/trunk/libf/dyn3d/addfi.F	(revision 19)
+++ LMDZ.3.3/trunk/libf/dyn3d/addfi.F	(revision 21)
@@ -67,6 +67,7 @@
       REAL xpn(iim),xps(iim),tpn,tps
       INTEGER j,k,iq,ij
-      REAL qtest
-      PARAMETER ( qtest = 1.0e-15 )
+      REAL qtestw, qtestt
+      PARAMETER ( qtestw = 1.0e-15 )
+      PARAMETER ( qtestt = 1.0e-40 )
 
       REAL SSUM
@@ -114,17 +115,22 @@
          pps(j) = pps(j) + pdpfi(j) * pdt
       ENDDO
-
-c
-
-      DO iq = 1, nq
+ 
+      DO iq = 1, 2
          DO k = 1,llm
             DO j = 1,ip1jmp1
                pq(j,k,iq)= pq(j,k,iq) + pdqfi(j,k,iq) * pdt
-               pq(j,k,iq)= AMAX1( pq(j,k,iq), qtest )
-ccc              pq(j,k,iq)=qtest
+               pq(j,k,iq)= AMAX1( pq(j,k,iq), qtestw )
             ENDDO
          ENDDO
       ENDDO
 
+      DO iq = 3, nq
+         DO k = 1,llm
+            DO j = 1,ip1jmp1
+               pq(j,k,iq)= pq(j,k,iq) + pdqfi(j,k,iq) * pdt
+               pq(j,k,iq)= AMAX1( pq(j,k,iq), qtestt )
+            ENDDO
+         ENDDO
+      ENDDO
 
       IF( alphax.NE.0. )   THEN