Fix for main.#3: Use coupling time step from file.

src/coupler/flux_exchange.F90

@@ -1109,6 +1109,7 @@ subroutine flux_exchange_init ( Time, Atm, Land, Ice, Ocean, Ocean_state,&
     Dt_cpl = 0
     if(present(dt_atmos)) Dt_atm = dt_atmos
     if(present(dt_cpld )) Dt_cpl = dt_cpld
+    WRITE (*,*) "Set coupling time step Dt_cpl=", Dt_cpl, " from dt_cpld=", dt_cpld
  
     !z1l check the flux conservation.
     if(debug_stocks) call check_flux_conservation(Ice, Ocean, Ice_Ocean_Boundary)
@@ -2530,7 +2531,7 @@ subroutine flux_down_from_atmos (Time, Atm, Land, Ice, &
 #IFDEF OASIS_IOW_ESM
   if (couple_flux_calculator) then
     write(*,*) 'calling oas_exchange_fields'
-    call oas_exchange_fields(Ice,Ice_boundary,ice_ocean_boundary,Time_start,Timet)
+    call oas_exchange_fields(Ice,Ice_boundary,ice_ocean_boundary,Time_start,Timet, INT(Dt_cpl))
   endif
 #ENDIF
 #IFDEF COUP_OAS !sandra

src/oasis_interface/oas_exchange_fields.F90

@@ -1,5 +1,5 @@
 #IFDEF OASIS_IOW_ESM
-SUBROUTINE oas_exchange_fields(Ice,Ice_boundary,Ice_Ocean_Boundary,Time_start,Timet)
+SUBROUTINE oas_exchange_fields(Ice,Ice_boundary,Ice_Ocean_Boundary,Time_start,Timet,dt_cpld)
 
 !!---------------------------------------------------------------------
 !!              ***  ROUTINE send_fld  ***
@@ -42,7 +42,8 @@ TYPE (ice_data_type),      INTENT(IN) :: Ice
 TYPE (atmos_ice_boundary_type), INTENT(INOUT) :: Ice_boundary
 type(ice_ocean_boundary_type), intent(inout) :: Ice_Ocean_Boundary
 type(time_type),           intent(in) :: Time_start,Timet ! for coupling sandra
-integer, parameter :: dt_cpld=600
+
+INTEGER, INTENT(IN) :: dt_cpld
 
   ztmp1 (:,:) = 0
   nrcvinfo (:) = OASIS_idle
@@ -51,8 +52,9 @@ integer, parameter :: dt_cpld=600
   isec = (864e2*dy+sc)
 
   write(*,*) 'inside oas_exchange_fields at isec=',isec
+  WRITE (*,*) "with coupling time step dt_cpld=", dt_cpld
   if (mod(isec,dt_cpld)==0) then
-    write(*,*) 'calling MPI_BARRIER'
+    write(*,*) 'calling MPI_BARRIER at isec=', isec, ', dt_cpld=', dt_cpld
     call MPI_BARRIER(MPI_COMM_WORLD,dummy)
     write(*,*) 'passed MPI_BARRIER'
   endif