diff --git a/src/ZSOLVER/advecuvw_rk.f90 b/src/ZSOLVER/advecuvw_rk.f90
index b617fffa6d22293b5eebb2686a4721a92e8fb081..ffdce5df247eb8b7cad744687ac5c924bcba083c 100644
--- a/src/ZSOLVER/advecuvw_rk.f90
+++ b/src/ZSOLVER/advecuvw_rk.f90
@@ -205,7 +205,8 @@ REAL, DIMENSION(:), ALLOCATABLE :: ZBUTS! Butcher array coefficients
!JUAN
TYPE(LIST_ll), POINTER :: TZFIELDMT_ll ! list of fields to exchange
TYPE(HALO2LIST_ll), POINTER :: TZHALO2MT_ll ! momentum variables
-TYPE(HALO2LIST_ll), POINTER :: TZHALO2_UT,TZHALO2_VT,TZHALO2_WT
+TYPE(HALO2LIST_ll), SAVE , POINTER :: TZHALO2_UT,TZHALO2_VT,TZHALO2_WT
+LOGICAL , SAVE :: GFIRST_CALL_ADVECUVW_RK = .TRUE.
INTEGER :: INBVAR
INTEGER :: IIU, IJU, IKU ! array sizes
!JUAN
@@ -459,10 +460,16 @@ ZRWS(:, :, :, : ) = 0.
!!$ CALL GET_HALO_D(ZVT,HNAME='ZVT')
!!$ CALL GET_HALO_D(ZWT,HNAME='ZWT')
!!$ CALL UPDATE_HALO2_ll(TZFIELDMT_ll, TZHALO2MT_ll, IINFO_ll)
+IF (GFIRST_CALL_ADVECUVW_RK) THEN
+ GFIRST_CALL_ADVECUVW_RK = .FALSE.
+ NULLIFY(TZHALO2_UT,TZHALO2_VT,TZHALO2_WT)
+ CALL INIT_HALO2_ll(TZHALO2_UT,1,IIU,IJU,IKU)
+ CALL INIT_HALO2_ll(TZHALO2_VT,1,IIU,IJU,IKU)
+ CALL INIT_HALO2_ll(TZHALO2_WT,1,IIU,IJU,IKU)
+END IF
CALL GET_HALO2_D(ZUT,TZHALO2_UT,HNAME='ZUT')
CALL GET_HALO2_D(ZVT,TZHALO2_VT,HNAME='ZVT')
- CALL GET_HALO2_D(ZWT,TZHALO2_WT,HNAME='ZWT')
-
+ CALL GET_HALO2_D(ZWT,TZHALO2_WT,HNAME='ZWT')
! acc update device(ZUT,ZVT,ZWT)
#endif
@@ -554,9 +561,9 @@ CALL MNH_REL_ZT3D(IZMEAN,IZWORK)
!
CALL CLEANLIST_ll(TZFIELDMT_ll)
CALL DEL_HALO2_ll(TZHALO2MT_ll)
-CALL DEL_HALO2_ll(TZHALO2_UT)
-CALL DEL_HALO2_ll(TZHALO2_VT)
-CALL DEL_HALO2_ll(TZHALO2_WT)
+!!$CALL DEL_HALO2_ll(TZHALO2_UT)
+!!$CALL DEL_HALO2_ll(TZHALO2_VT)
+!!$CALL DEL_HALO2_ll(TZHALO2_WT)
!$acc update self(PRUS_ADV,PRVS_ADV,PRWS_ADV)
!-------------------------------------------------------------------------------
!
diff --git a/src/ZSOLVER/contrav.f90 b/src/ZSOLVER/contrav.f90
index ebef79590bb7b5f6faa48cb6a8a680d0525a4f3e..b909f2298ec78c1c49736162c0f57533620983b3 100644
--- a/src/ZSOLVER/contrav.f90
+++ b/src/ZSOLVER/contrav.f90
@@ -567,7 +567,8 @@ LOGICAL :: GDATA_ON_DEVICE
real :: ZTMP1, ZTMP2 ! Intermediate work variables
REAL, DIMENSION(:,:), POINTER , CONTIGUOUS :: ZU_EAST, ZV_NORTH, ZDZX_EAST, ZDZY_NORTH
TYPE(LIST_ll), POINTER :: TZFIELD_U, TZFIELD_V, TZFIELD_DZX, TZFIELD_DZY
-TYPE(HALO2LIST_ll), POINTER :: TZHALO2_U, TZHALO2_V, TZHALO2_DZX, TZHALO2_DZY
+TYPE(HALO2LIST_ll), SAVE, POINTER :: TZHALO2_U, TZHALO2_V, TZHALO2_DZX, TZHALO2_DZY
+LOGICAL , SAVE :: GFIRST_CALL_CONTRAV_DEVICE = .TRUE.
!
LOGICAL :: GWEST,GEAST,GSOUTH,GNORTH
!
@@ -634,14 +635,17 @@ IF (KADV_ORDER == 4 ) THEN
!!$ NULLIFY(TZFIELD_DZY)
!!$ CALL ADD3DFIELD_ll( TZFIELD_DZX, PDZX, 'CONTRAV::PDZX' )
!!$ CALL ADD3DFIELD_ll( TZFIELD_DZY, PDZY, 'CONTRAV::PDZY' )
-!!$ NULLIFY(TZHALO2_U)
-!!$ NULLIFY(TZHALO2_V)
-!!$ NULLIFY(TZHALO2_DZX)
-!!$ NULLIFY(TZHALO2_DZY)
-!!$ CALL INIT_HALO2_ll(TZHALO2_U,1,IIU,IJU,IKU)
-!!$ CALL INIT_HALO2_ll(TZHALO2_V,1,IIU,IJU,IKU)
-!!$ CALL INIT_HALO2_ll(TZHALO2_DZX,1,IIU,IJU,IKU)
-!!$ CALL INIT_HALO2_ll(TZHALO2_DZY,1,IIU,IJU,IKU)
+ IF ( GFIRST_CALL_CONTRAV_DEVICE ) THEN
+ GFIRST_CALL_CONTRAV_DEVICE = .FALSE.
+ NULLIFY(TZHALO2_U)
+ NULLIFY(TZHALO2_V)
+ NULLIFY(TZHALO2_DZX)
+ NULLIFY(TZHALO2_DZY)
+ CALL INIT_HALO2_ll(TZHALO2_U,1,IIU,IJU,IKU)
+ CALL INIT_HALO2_ll(TZHALO2_V,1,IIU,IJU,IKU)
+ CALL INIT_HALO2_ll(TZHALO2_DZX,1,IIU,IJU,IKU)
+ CALL INIT_HALO2_ll(TZHALO2_DZY,1,IIU,IJU,IKU)
+ END IF
!!$ CALL UPDATE_HALO2_ll(TZFIELD_U, TZHALO2_U, IINFO_ll)
!!$ CALL UPDATE_HALO2_ll(TZFIELD_V, TZHALO2_V, IINFO_ll)
!!$ CALL UPDATE_HALO2_ll(TZFIELD_DZX, TZHALO2_DZX, IINFO_ll)
@@ -874,10 +878,10 @@ IF (KADV_ORDER == 4 ) THEN
!!$ !!$ IF (NHALO==1) THEN
!!$ CALL CLEANLIST_ll(TZFIELD_DZX)
!!$ CALL CLEANLIST_ll(TZFIELD_DZY)
- CALL DEL_HALO2_ll(TZHALO2_U)
- CALL DEL_HALO2_ll(TZHALO2_V)
- CALL DEL_HALO2_ll(TZHALO2_DZX)
- CALL DEL_HALO2_ll(TZHALO2_DZY)
+!!$ CALL DEL_HALO2_ll(TZHALO2_U)
+!!$ CALL DEL_HALO2_ll(TZHALO2_V)
+!!$ CALL DEL_HALO2_ll(TZHALO2_DZX)
+!!$ CALL DEL_HALO2_ll(TZHALO2_DZY)
!!$ !!$ END IF
END IF
diff --git a/src/ZSOLVER/get_halo.f90 b/src/ZSOLVER/get_halo.f90
index acd7833cfc98ed5c7d0ec847b3f7cba64eba097f..201e1170b0e1f3440861d58adec87ee0bb2770fb 100644
--- a/src/ZSOLVER/get_halo.f90
+++ b/src/ZSOLVER/get_halo.f90
@@ -1513,7 +1513,7 @@ end if
CALL GET_HALO_DD(PSRC,HNAME=yname)
!!$NULLIFY( TZ_PSRC_ll,TP_PSRC_HALO2_ll)
-CALL INIT_HALO2_ll(TP_PSRC_HALO2_ll,1,IIU,IJU,IKU)
+!!$CALL INIT_HALO2_ll(TP_PSRC_HALO2_ll,1,IIU,IJU,IKU)
!
CALL GET_HALO2_DD(PSRC,TP_PSRC_HALO2_ll,'GET_HALO2_DD::'//trim( yname ) )
!
diff --git a/src/ZSOLVER/ppm.f90 b/src/ZSOLVER/ppm.f90
index 2e899596cb4aa4108d7148a3c9582c3da2f1dc56..bfeac23c637953aeb011208d622d783c8c34ff34 100644
--- a/src/ZSOLVER/ppm.f90
+++ b/src/ZSOLVER/ppm.f90
@@ -2557,8 +2557,8 @@ INTEGER :: I,J,K
REAL, DIMENSION(:,:) :: ZPSRC_HALO2_WEST
#endif
-TYPE(HALO2LIST_ll), POINTER :: TZ_PSRC_HALO2_ll ! halo2 for PSRC
-
+TYPE(HALO2LIST_ll), SAVE , POINTER :: TZ_PSRC_HALO2_ll ! halo2 for PSRC
+LOGICAL, SAVE :: GFIRST_CALL_PPM_S0_X = .TRUE.
!-------------------------------------------------------------------------------
!$acc data present( PSRC, PCR, PRHO, PR , &
@@ -2593,6 +2593,11 @@ GEAST = LEAST_ll()
!!$CALL GET_HALO2(PSRC, TZ_PSRC_HALO2_ll, HNAME='PSRC')
!!$ZPSRC_HALO2_WEST(:,:) = TZ_PSRC_HALO2_ll%HALO2%WEST(:,:)
!!$!$acc update device (ZPSRC_HALO2_WEST)
+IF (GFIRST_CALL_PPM_S0_X) THEN
+ GFIRST_CALL_PPM_S0_X = .FALSE.
+ NULLIFY(TZ_PSRC_HALO2_ll)
+ CALL INIT_HALO2_ll(TZ_PSRC_HALO2_ll,1,IIU,IJU,IKU)
+END IF
CALL GET_HALO2_D(PSRC, TZ_PSRC_HALO2_ll, HNAME='PSRC')
!$acc kernels
ZPSRC_HALO2_WEST(:,:) = TZ_PSRC_HALO2_ll%HALO2%WEST(:,:)
@@ -2834,7 +2839,7 @@ CALL GET_HALO(PR, HNAME='PR')
CALL GET_HALO_D(PR, HDIR="S0_X", HNAME='PR')
#endif
!-------------------------------------------------------------------------------
-CALL DEL_HALO2_ll(TZ_PSRC_HALO2_ll)
+!!$CALL DEL_HALO2_ll(TZ_PSRC_HALO2_ll)
IF (MPPDB_INITIALIZED) THEN
!Check all INOUT arrays
@@ -2993,7 +2998,9 @@ REAL, DIMENSION(:,:,:) :: ZFPOS, ZFNEG
! variable at cell edges
REAL, DIMENSION(:,:,:) :: ZPHAT
!
-TYPE(HALO2LIST_ll), POINTER :: TZ_PSRC_HALO2_ll ! halo2 for PSRC
+TYPE(HALO2LIST_ll), SAVE ,POINTER :: TZ_PSRC_HALO2_ll ! halo2 for PSRC
+LOGICAL, SAVE :: GFIRST_CALL_PPM_S0_Y = .TRUE.
+
TYPE(HALO2LIST_ll), POINTER :: TZ_PHAT_HALO2_ll ! halo2 for ZPHAT
!
REAL, DIMENSION(:,:,:) :: ZRHO_MYM , ZCR_MYM , ZCR_DYF
@@ -3045,6 +3052,11 @@ ELSE !not L2D
!!$CALL GET_HALO2(PSRC, TZ_PSRC_HALO2_ll, HNAME='PSRC')
!!$ZPSRC_HALO2_SOUTH(:,:) = TZ_PSRC_HALO2_ll%HALO2%SOUTH(:,:)
!!$!$acc update device (ZPSRC_HALO2_SOUTH)
+IF (GFIRST_CALL_PPM_S0_Y) THEN
+ GFIRST_CALL_PPM_S0_Y = .FALSE.
+ NULLIFY(TZ_PSRC_HALO2_ll)
+ CALL INIT_HALO2_ll(TZ_PSRC_HALO2_ll,1,IIU,IJU,IKU)
+END IF
CALL GET_HALO2_D(PSRC, TZ_PSRC_HALO2_ll, HNAME='PSRC')
!
! Initialize with relalistic value all work array
@@ -3281,7 +3293,7 @@ CALL GET_HALO(PR, HNAME='PR')
CALL GET_HALO_D(PR, HDIR="S0_Y", HNAME='PR')
#endif
!
-CALL DEL_HALO2_ll(TZ_PSRC_HALO2_ll)
+!!$CALL DEL_HALO2_ll(TZ_PSRC_HALO2_ll)
!
IF (MPPDB_INITIALIZED) THEN
!Check all INOUT arrays