diff --git a/src/MNH/deallocate_model1.f90 b/src/MNH/deallocate_model1.f90
index ebae4a9b53232850e7d5a41b0b7bd945a43f14bb..82791e2bd6244a3ff6eb685a0b92598c00a6f784 100644
--- a/src/MNH/deallocate_model1.f90
+++ b/src/MNH/deallocate_model1.f90
@@ -219,14 +219,16 @@ IF ( ASSOCIATED(XLON) .AND. KCALL == 3 ) THEN
 END IF
 !
 IF ( KCALL == 3 ) THEN
-  DEALLOCATE(XXHAT)
+  !Philippe W.: do not deallocate XXHAT, XYHAT and XZHAT because they are needed later on
+  !As they are 1D, their memory footprint is negligible
+  ! DEALLOCATE(XXHAT)
   DEALLOCATE(XDXHAT)
-  DEALLOCATE(XYHAT)
+  ! DEALLOCATE(XYHAT)
   DEALLOCATE(XDYHAT)
   DEALLOCATE(XZS)
   DEALLOCATE(XZSMT)
   DEALLOCATE(XZZ)
-  DEALLOCATE(XZHAT)
+  ! DEALLOCATE(XZHAT)
 END IF
 !
 IF ( KCALL == 2 ) THEN
diff --git a/src/MNH/read_prc_fmfile.f90 b/src/MNH/read_prc_fmfile.f90
index 363d61fcb0f35c9edc14f6f57d07d8abb8aee9db..50274d6a0dbe869d52bf702346296e641ce9348b 100644
--- a/src/MNH/read_prc_fmfile.f90
+++ b/src/MNH/read_prc_fmfile.f90
@@ -163,9 +163,6 @@ REAL, DIMENSION(:,:),   ALLOCATABLE :: ZINPRG_LS
 REAL, DIMENSION(:,:),   ALLOCATABLE :: ZACPRG_LS
 REAL, DIMENSION(:,:),   ALLOCATABLE :: ZINPRH_LS
 REAL, DIMENSION(:,:),   ALLOCATABLE :: ZACPRH_LS
-REAL, DIMENSION(:),     ALLOCATABLE :: ZXHAT
-REAL, DIMENSION(:),     ALLOCATABLE :: ZYHAT
-REAL, DIMENSION(:),     ALLOCATABLE :: ZZHAT
 INTEGER  :: IMI
 !
 !20131105 add vars related to ADD3DFIELD and UPDATE_HALO
@@ -290,18 +287,6 @@ END IF
 !
 !-------------------------------------------------------------------------------
 !
-!*       4.    SAVE FIELDS STORED IN MODEL1 MODULE already INITIALIZED in PREP_REAL_CASE
-!              -------------------------------------------------------------------------
-!
-ALLOCATE(ZXHAT(SIZE(XXHAT)))
-ALLOCATE(ZYHAT(SIZE(XYHAT)))
-ALLOCATE(ZZHAT(SIZE(XZHAT)))
-ZXHAT(:) = XXHAT(:)
-ZYHAT(:) = XYHAT(:)
-ZZHAT(:) = XZHAT(:)
-!
-!-------------------------------------------------------------------------------
-!
 !*       5.    DEALLOCATIONS OF FIELDS OF MODEL1
 !              ---------------------------------
 !
@@ -317,16 +302,6 @@ DEALLOCATE(XTHVREFZ)
 !*       6.    RECOVERS FIELDS STORED IN MODEL1 MODULE already INITIALIZED in PREP_REAL_CASE
 !              -----------------------------------------------------------------------------
 !
-ALLOCATE(XXHAT(SIZE(ZXHAT)))
-ALLOCATE(XYHAT(SIZE(ZYHAT)))
-ALLOCATE(XZHAT(SIZE(ZZHAT)))
-XXHAT(:) = ZXHAT(:)
-XYHAT(:) = ZYHAT(:)
-XZHAT(:) = ZZHAT(:)
-DEALLOCATE(ZXHAT)
-DEALLOCATE(ZYHAT)
-DEALLOCATE(ZZHAT)
-!
 IF (ALLOCATED(ZINPRC_LS)) THEN
   ALLOCATE(XINPRC(IIU,IJU))
   ALLOCATE(XACPRC(IIU,IJU))