diff --git a/src/MNH/p_abs.f90 b/src/MNH/p_abs.f90
index 16f888bc871cd2519f079ed9883dd8e8aa7fb27f..82f03829b11a2a01f3b14a0e4e73c7ddbbc618b9 100644
--- a/src/MNH/p_abs.f90
+++ b/src/MNH/p_abs.f90
@@ -120,7 +120,7 @@ USE MODD_REF,         ONLY: LBOUSS
 USE MODE_ll
 USE MODE_REPRO_SUM
 !
-#ifdef MNH_BITREP
+#if defined(MNH_BITREP) || defined(MNH_BITREP_OMP)
 USE MODI_BITREP
 #endif
 !
@@ -243,7 +243,7 @@ IF ( CEQNSYS=='DUR' .OR. CEQNSYS=='MAE' ) THEN
       DO JJ = IJB,IJE
         DO JI = IIB,IIE
           ZMASSGUESS_2D(JI,JJ)  = ZMASSGUESS_2D(JI,JJ) +                          &
-#ifndef MNH_BITREP
+#if !defined(MNH_BITREP) && !defined(MNH_BITREP_OMP)
                 (PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK))**ZCVD_O_RD   &
 #else
                 BR_POW((PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK)),ZCVD_O_RD) &
@@ -261,7 +261,7 @@ IF ( CEQNSYS=='DUR' .OR. CEQNSYS=='MAE' ) THEN
       DO JJ = IJB,IJE
         DO JI = IIB,IIE
           ZMASSGUESS_2D(JI,JJ)  = ZMASSGUESS_2D(JI,JJ) +                               &
-#ifndef MNH_BITREP
+#if !defined(MNH_BITREP) && !defined(MNH_BITREP_OMP)
              (PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK))**ZCVD_O_RD        &
 #else
              BR_POW((PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK)),ZCVD_O_RD) &
@@ -295,7 +295,7 @@ IF ( CEQNSYS=='DUR' .OR. CEQNSYS=='MAE' ) THEN
       DO JJ = IJB,IJE
         DO JI = IIB,IIE
           ZMASSGUESS_2D(JI,JJ)  = ZMASSGUESS_2D(JI,JJ) +                               &
-#ifndef MNH_BITREP
+#if !defined(MNH_BITREP) && !defined(MNH_BITREP_OMP)                   
            (PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK))**ZCVD_O_RD          &
 #else
            BR_POW((PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK)),ZCVD_O_RD) &
@@ -309,7 +309,7 @@ IF ( CEQNSYS=='DUR' .OR. CEQNSYS=='MAE' ) THEN
       DO JJ = IJB,IJE
         DO JI = IIB,IIE
           ZMASSGUESS_2D(JI,JJ)  = ZMASSGUESS_2D(JI,JJ) +                                &
-#ifndef MNH_BITREP
+#if !defined(MNH_BITREP) && !defined(MNH_BITREP_OMP)
             (PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK))**ZCVD_O_RD          &
 #else
             BR_POW((PEXNREF(JI,JJ,JK)+PPHIT(JI,JJ,JK)),ZCVD_O_RD) &
@@ -343,7 +343,7 @@ ELSEIF( CEQNSYS == 'LHE' ) THEN
   IF (LBOUSS) THEN
     ZRHOREF(:,:,:) = PRHODREF(:,:,:)
   ELSE
-#ifndef MNH_BITREP
+#if !defined(MNH_BITREP) && !defined(MNH_BITREP_OMP)
     ZRHOREF(:,:,:) = PEXNREF(:,:,:) ** ZCVD_O_RD    &
 #else
     ZRHOREF(:,:,:) = BR_POW( PEXNREF(:,:,:), ZCVD_O_RD )&
diff --git a/src/MNH/pressurez.f90 b/src/MNH/pressurez.f90
index ee3bbf18be8ebcf6b0de7e34f6f6a86576f6fbc9..92cb564261eb006f752a59d619546b292260e27a 100644
--- a/src/MNH/pressurez.f90
+++ b/src/MNH/pressurez.f90
@@ -247,7 +247,7 @@ USE MODE_MPPDB
 USE MODE_MSG
 USE MODE_SUM2_ll,     ONLY: GMAXLOC_ll
 !
-#ifdef MNH_BITREP
+#if defined(MNH_BITREP) || defined(MNH_BITREP_OMP)
 USE MODI_BITREP
 #endif
 USE MODI_CONJGRAD
@@ -546,7 +546,7 @@ IF(CEQNSYS=='MAE' .OR. CEQNSYS=='DUR') THEN
     ENDWHERE 
   ENDIF
   !
-#ifndef MNH_BITREP
+#if !defined(MNH_BITREP) && !defined(MNH_BITREP_OMP)
   ZPHIT(:,:,:)=(PPABST(:,:,:)/XP00)**(XRD/XCPD)-PEXNREF(:,:,:)
 #else
   ZPHIT(:,:,:)=BR_POW(PPABST(:,:,:)/XP00,XRD/XCPD)-PEXNREF(:,:,:)
@@ -830,7 +830,7 @@ IF ((ZMAX_ll > 1.E-12) .AND. KTCOUNT >0 ) THEN
                  PRVREF, PEXNREF, ZPHIT, ZPHI0                       )
 !
   IF(CEQNSYS=='MAE' .OR. CEQNSYS=='DUR') THEN
-#ifndef MNH_BITREP
+#if !defined(MNH_BITREP) && !defined(MNH_BITREP_OMP)
     PPABST(:,:,:)=XP00*(ZPHIT+PEXNREF)**(XCPD/XRD)
 #else
     PPABST(:,:,:)=XP00*BR_POW((ZPHIT+PEXNREF),(XCPD/XRD))
diff --git a/src/ZSOLVER/modeln.f90 b/src/ZSOLVER/modeln.f90
index 9b7ece1a6c90222eea6f1d307f74324ef4fa6ed8..ce37ab13b86dab14b34389ce438acddfa791483b 100644
--- a/src/ZSOLVER/modeln.f90
+++ b/src/ZSOLVER/modeln.f90
@@ -459,6 +459,9 @@ USE MODI_WRITE_LFIFM_n
 USE MODI_WRITE_SERIES_n
 USE MODI_WRITE_STATION_n
 USE MODI_WRITE_SURF_ATM_N
+#ifdef MNH_BITREP_OMP
+USE MODI_BITREPZ
+#endif
 !
 IMPLICIT NONE
 !
@@ -1649,6 +1652,10 @@ XTIME_LES_BU_PROCESS = 0.
 !$acc data copyin (XTKET, XRSVS_CLD) &
 !$acc &    copy   (XRTKES, XRSVS)    &
 !$acc &    copyout(XRTKEMS)
+#ifdef MNH_BITREP_OMP
+CALL SBR_FZ(XRRS_CLD)
+CALL SBR_FZ(XRT)
+#endif
 CALL ADVECTION_METSV ( TZBAKFILE, CUVW_ADV_SCHEME,                     &
                  CMET_ADV_SCHEME, CSV_ADV_SCHEME, CCLOUD, NSPLIT,      &
                  LSPLIT_CFL, XSPLIT_CFL, LCFL_WRIT,                    &