diff --git a/src/MNH/ini_lb.f90 b/src/MNH/ini_lb.f90
index b4d44b50adff30ff2ee57769d3b6be3bbbceba63..79eac4a6e755e814bc908f200675fb50b5707275 100644
--- a/src/MNH/ini_lb.f90
+++ b/src/MNH/ini_lb.f90
@@ -1,4 +1,4 @@
-!MNH_LIC Copyright 1998-2020 CNRS, Meteo-France and Universite Paul Sabatier
+!MNH_LIC Copyright 1998-2021 CNRS, Meteo-France and Universite Paul Sabatier
 !MNH_LIC This is part of the Meso-NH software governed by the CeCILL-C licence
 !MNH_LIC version 1. See LICENSE, CeCILL-C_V1-en.txt and CeCILL-C_V1-fr.txt
 !MNH_LIC for details. version 1.
@@ -689,7 +689,14 @@ IF (CCLOUD=='LIMA' ) THEN
         CASE ('READ')
           WRITE(INDICE,'(I2.2)')(JSV - NSV_LIMA_CCN_FREE + 1)
           IF ( KSIZELBXSV_ll /= 0 ) THEN
-            TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3))//INDICE)
+            IF (        TPINIFILE%NMNHVERSION(1) < 5                                       &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) < 5 ) &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) == 5  &
+                        .AND. TPINIFILE%NMNHVERSION(3) < 1 ) ) THEN
+              TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3))//INDICE)
+            ELSE
+              TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3)))//INDICE
+            END IF
             TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
             TZFIELD%CLBTYPE    = 'LBX'
             WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'2_Y_Z_','LBXSVM',JSV
@@ -708,7 +715,14 @@ IF (CCLOUD=='LIMA' ) THEN
           END IF
           !
           IF (KSIZELBYSV_ll  /= 0 ) THEN
-            TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3))//INDICE)
+            IF (        TPINIFILE%NMNHVERSION(1) < 5                                       &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) < 5 ) &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) == 5  &
+                        .AND. TPINIFILE%NMNHVERSION(3) < 1 ) ) THEN
+              TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3))//INDICE)
+            ELSE
+              TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3)))//INDICE
+            END IF
             TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
             TZFIELD%CLBTYPE    = 'LBY'
             WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'X_2_Z_','LBYSVM',JSV
@@ -746,7 +760,14 @@ IF (CCLOUD=='LIMA' ) THEN
         CASE ('READ')
           WRITE(INDICE,'(I2.2)')(JSV - NSV_LIMA_IFN_FREE + 1)
           IF ( KSIZELBXSV_ll /= 0 ) THEN
-            TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2))//INDICE)
+            IF (        TPINIFILE%NMNHVERSION(1) < 5                                       &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) < 5 ) &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) == 5  &
+                        .AND. TPINIFILE%NMNHVERSION(3) < 1 ) ) THEN
+              TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2))//INDICE)
+            ELSE
+              TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2)))//INDICE
+            END IF
             TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
             TZFIELD%CLBTYPE    = 'LBX'
             WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'2_Y_Z_','LBXSVM',JSV
@@ -765,7 +786,14 @@ IF (CCLOUD=='LIMA' ) THEN
           END IF
           !
           IF (KSIZELBYSV_ll  /= 0 ) THEN
-            TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2))//INDICE)
+            IF (        TPINIFILE%NMNHVERSION(1) < 5                                       &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) < 5 ) &
+                 .OR. ( TPINIFILE%NMNHVERSION(1) == 5 .AND. TPINIFILE%NMNHVERSION(2) == 5  &
+                        .AND. TPINIFILE%NMNHVERSION(3) < 1 ) ) THEN
+              TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2))//INDICE)
+            ELSE
+              TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2)))//INDICE
+            END IF
             TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
             TZFIELD%CLBTYPE    = 'LBY'
             WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'X_2_Z_','LBYSVM',JSV
diff --git a/src/MNH/write_lbn.f90 b/src/MNH/write_lbn.f90
index dc3fd036f944836a55cfef155c74925c3b9fcaf4..52a15c509b2ab998b81b2789cbaf8be390212636 100644
--- a/src/MNH/write_lbn.f90
+++ b/src/MNH/write_lbn.f90
@@ -381,7 +381,7 @@ IF (NSV >=1) THEN
     DO JSV = NSV_LIMA_CCN_FREE,NSV_LIMA_CCN_FREE+NMOD_CCN-1
       WRITE(INDICE,'(I2.2)')(JSV - NSV_LIMA_CCN_FREE + 1)
       IF(NSIZELBXSV_ll /= 0) THEN
-        TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3))//INDICE)
+        TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3)))//INDICE
         TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
         TZFIELD%CLBTYPE    = 'LBX'
         WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'2_Y_Z_','LBXSVM',JSV
@@ -389,7 +389,7 @@ IF (NSV >=1) THEN
       END IF
       !
       IF(NSIZELBYSV_ll /= 0) THEN
-        TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3))//INDICE)
+        TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_WARM_NAMES(3)))//INDICE
         TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
         TZFIELD%CLBTYPE    = 'LBY'
         WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'X_2_Z_','LBYSVM',JSV
@@ -400,7 +400,7 @@ IF (NSV >=1) THEN
     DO JSV = NSV_LIMA_IFN_FREE,NSV_LIMA_IFN_FREE+NMOD_IFN-1
       WRITE(INDICE,'(I2.2)')(JSV - NSV_LIMA_IFN_FREE + 1)
       IF(NSIZELBXSV_ll /= 0) THEN
-        TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2))//INDICE)
+        TZFIELD%CMNHNAME   = 'LBX_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2)))//INDICE
         TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
         TZFIELD%CLBTYPE    = 'LBX'
         WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'2_Y_Z_','LBXSVM',JSV
@@ -408,7 +408,7 @@ IF (NSV >=1) THEN
       END IF
       !
       IF(NSIZELBYSV_ll /= 0) THEN
-        TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2))//INDICE)
+        TZFIELD%CMNHNAME   = 'LBY_'//TRIM(UPCASE(CLIMA_COLD_NAMES(2)))//INDICE
         TZFIELD%CLONGNAME  = TRIM(TZFIELD%CMNHNAME)
         TZFIELD%CLBTYPE    = 'LBY'
         WRITE(TZFIELD%CCOMMENT,'(A6,A6,I3.3)')'X_2_Z_','LBYSVM',JSV