diff --git a/src/MNH/fft.f90 b/src/MNH/fft.f90
index 4d7536c30873167f3b702ae5b9c04bd5f8f6c420..59ac09b1d200542c117f0c1bcc5309a3d016b3be 100644
--- a/src/MNH/fft.f90
+++ b/src/MNH/fft.f90
@@ -1,4 +1,4 @@
-!MNH_LIC Copyright 1994-2022 CNRS, Meteo-France and Universite Paul Sabatier
+!MNH_LIC Copyright 1994-2023 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.
@@ -84,7 +84,7 @@ SUBROUTINE SET99( TRIGS, IFAX, N )
 END SUBROUTINE SET99
 
 
-SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW, KSZT )
+SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, JUMP, N, ILOT, ISIGN, KSZA, KSZW, KSZT )
   USE MODE_MPPDB
 
   IMPLICIT NONE
@@ -93,7 +93,7 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
       REAL,    DIMENSION(KSZW), INTENT(OUT) :: WORK
       REAL,    DIMENSION(KSZT), INTENT(IN) :: TRIGS
       INTEGER, DIMENSION(19),   INTENT(IN) :: IFAX
-      INTEGER,                  INTENT(IN) :: INC, JUMP, N, ILOT, ISIGN
+      INTEGER,                  INTENT(IN) :: JUMP, N, ILOT, ISIGN
       INTEGER,                  INTENT(IN) :: KSZA, KSZW, KSZT
 !
 !     SUBROUTINE 'FFT991' - MULTIPLE FAST REAL PERIODIC TRANSFORM
@@ -106,8 +106,6 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
 !     WORK IS AN AREA OF SIZE (N+1)*MIN(ILOT,LOT)
 !     TRIGS IS A PREVIOUSLY PREPARED LIST OF TRIG FUNCTION VALUES
 !     IFAX IS A PREVIOUSLY PREPARED LIST OF FACTORS OF N
-!     INC IS THE INCREMENT WITHIN EACH DATA 'VECTOR'
-!         (E.G. INC=1 FOR CONSECUTIVELY STORED DATA)
 !     JUMP IS THE INCREMENT BETWEEN THE START OF EACH DATA VECTOR
 !     N IS THE LENGTH OF THE DATA VECTORS
 !     ILOT IS THE NUMBER OF DATA VECTORS
@@ -180,12 +178,12 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
 !$acc loop independent private( I )
       DO J=1,NVEX
         I = ISTART + ( J - 1 ) * JUMP
-        A(I+INC)=0.5*A(I)
+        A(I+1)=0.5*A(I)
       END DO
 !$acc end kernels
       IF ( MOD(N,2) == 0 ) THEN
 !$acc kernels
-        I0 = ISTART + N * INC
+        I0 = ISTART + N
 !CDIR NODEP
 !*vocl loop,novrec
 !$acc loop independent private( I )
@@ -195,7 +193,7 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
         END DO
 !$acc end kernels
       END IF
-      IA=ISTART+INC
+      IA=ISTART+1
       ILA=1
       IGO=+1
 !
@@ -203,17 +201,17 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
         IFAC=IFAX(K+1)
         IERR=-1
         IF ( IGO == 1 ) THEN
-          CALL RPASSM(A(IA:),A(IA+ILA*INC:),WORK(1:),WORK(IFAC*ILA+1:), &
+          CALL RPASSM(A(IA:),A(IA+ILA:),WORK(1:),WORK(IFAC*ILA+1:), &
               TRIGS(:),                                                     &
-              INC,1,JUMP,NX,NVEX,N,IFAC,ILA,IERR,                           &
-              SIZE(A(IA:)),SIZE(A(IA+ILA*INC:)),SIZE(WORK(1:)),             &
+              1,1,JUMP,NX,NVEX,N,IFAC,ILA,IERR,                           &
+              SIZE(A(IA:)),SIZE(A(IA+ILA:)),SIZE(WORK(1:)),             &
               SIZE(WORK(IFAC*ILA+1:)),SIZE(TRIGS(:)))
         ELSE
-          CALL RPASSM(WORK(1:),WORK(ILA+1:),A(IA:),A(IA+IFAC*ILA*INC:), &
+          CALL RPASSM(WORK(1:),WORK(ILA+1:),A(IA:),A(IA+IFAC*ILA:), &
              TRIGS(:),                                                      &
-             1,INC,NX,JUMP,NVEX,N,IFAC,ILA,IERR,                            &
+             1,1,NX,JUMP,NVEX,N,IFAC,ILA,IERR,                            &
              SIZE(WORK(1:)),SIZE(WORK(ILA+1:)),SIZE(A(IA:)),                &
-             SIZE(A(IA+IFAC*ILA*INC:)),SIZE(TRIGS(:)))
+             SIZE(A(IA+IFAC*ILA:)),SIZE(TRIGS(:)))
         END IF
         IF (IERR.NE.0) GO TO 500
         ILA=IFAC*ILA
@@ -233,7 +231,7 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
           DO II=1,N
             A(J)=WORK(I)
             I=I+1
-            J=J+INC
+            J=J+1
           END DO
           IBASE=IBASE+NX
           JBASE=JBASE+JUMP
@@ -244,8 +242,8 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
 !     FILL IN ZEROS AT END
 !     --------------------
 !$acc kernels
-      A(ISTART+N*INC::JUMP) = 0.0
-      A(ISTART+(N+1)*INC::JUMP) = 0.0
+      A(ISTART+N::JUMP) = 0.0
+      A(ISTART+N+1::JUMP) = 0.0
 !$acc end kernels
 !
       ISTART=ISTART+NVEX*JUMP
@@ -267,21 +265,21 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
         ILA=ILA/IFAC
         IERR=-1
         IF ( IGO == 1 ) THEN
-          CALL QPASSM(A(IA:),A(IA+IFAC*ILA*INC:),WORK(1:),WORK(ILA+1:), &
-              TRIGS(:),                                                     &
-              INC,1,JUMP,NX,NVEX,N,IFAC,ILA,IERR,                           &
-              SIZE(A(IA:)),SIZE(A(IA+IFAC*ILA*INC:)),SIZE(WORK(1:)),        &
+          CALL QPASSM(A(IA:),A(IA+IFAC*ILA:),WORK(1:),WORK(ILA+1:), &
+              TRIGS(:),                                             &
+              1,1,JUMP,NX,NVEX,N,IFAC,ILA,IERR,                     &
+              SIZE(A(IA:)),SIZE(A(IA+IFAC*ILA:)),SIZE(WORK(1:)),    &
               SIZE(WORK(ILA+1:)),SIZE(TRIGS(:)))
         ELSE
-          CALL QPASSM(WORK(1:),WORK(IFAC*ILA+1:),A(IA:),A(IA+ILA*INC:), &
-              TRIGS(:),                                                     &
-              1,INC,NX,JUMP,NVEX,N,IFAC,ILA,IERR,                           &
-              SIZE(WORK(1:)),SIZE(WORK(IFAC*ILA+1:)),SIZE(A(IA:)),          &
-              SIZE(A(IA+ILA*INC:)),SIZE(TRIGS(:)))
+          CALL QPASSM(WORK(1:),WORK(IFAC*ILA+1:),A(IA:),A(IA+ILA:), &
+              TRIGS(:),                                             &
+              1,1,NX,JUMP,NVEX,N,IFAC,ILA,IERR,                     &
+              SIZE(WORK(1:)),SIZE(WORK(IFAC*ILA+1:)),SIZE(A(IA:)),  &
+              SIZE(A(IA+ILA:)),SIZE(TRIGS(:)))
         END IF
         IF (IERR.NE.0) GO TO 500
         IGO=-IGO
-        IA=ISTART+INC
+        IA=ISTART+1
       END DO
 !
 !     IF NECESSARY, COPY RESULTS BACK TO A
@@ -296,7 +294,7 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
           DO II=1,N
             A(J)=WORK(I)
             I=I+1
-            J=J+INC
+            J=J+1
           END DO
           IBASE=IBASE+NX
           JBASE=JBASE+JUMP
@@ -312,13 +310,13 @@ SUBROUTINE FFT991( A, WORK, TRIGS, IFAX, INC, JUMP, N, ILOT, ISIGN, KSZA, KSZW,
 !$acc loop independent private( I )
       DO J=1,NVEX
         IX  = ISTART + ( J - 1 ) * JUMP
-        A(IX)=A(IX+INC)
-        A(IX+INC)=0.0
+        A(IX)=A(IX+1)
+        A(IX+1)=0.0
       END DO
 !$acc end kernels
       IF ( MOD(N,2) == 0 ) THEN
 !$acc kernels
-        A(ISTART+(N+1)*INC::JUMP) = 0.0
+        A(ISTART+N+1::JUMP) = 0.0
 !$acc end kernels
       END IF
 !
diff --git a/src/MNH/fft55.f90 b/src/MNH/fft55.f90
index 96d59414805831ad5edcb552fb553f09c8497e8e..aed1c343f214045794ca3b0fe7bca58fd52cf5f2 100644
--- a/src/MNH/fft55.f90
+++ b/src/MNH/fft55.f90
@@ -1,4 +1,4 @@
-!MNH_LIC Copyright 1987-2022 CNRS, Meteo-France and Universite Paul Sabatier
+!MNH_LIC Copyright 1987-2023 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.
@@ -212,7 +212,7 @@ IF (KISIGN.EQ.1) THEN
 !
     IIS=-1
     IIA=ISTART
-    CALL FFT991(ZA(IIA:),ZWORK(:),PTRIGS,KIFAX,1,KJUMP,KN,INVEX,IIS,SIZE(ZA(IIA:)),SIZE(ZWORK(:)),SIZE(PTRIGS))
+    CALL FFT991(ZA(IIA:),ZWORK(:),PTRIGS,KIFAX,KJUMP,KN,INVEX,IIS,SIZE(ZA(IIA:)),SIZE(ZWORK(:)),SIZE(PTRIGS))
 !
 !      2.3     postprocessing
 !              --------------
@@ -291,7 +291,7 @@ ELSE
 !
     IIA=ISTART
     IIS=1
-    CALL FFT991(ZA(IIA:),ZWORK(:),PTRIGS,KIFAX,1,KJUMP,KN,INVEX,IIS,SIZE(ZA(IIA:)),SIZE(ZWORK(:)),SIZE(PTRIGS))
+    CALL FFT991(ZA(IIA:),ZWORK(:),PTRIGS,KIFAX,KJUMP,KN,INVEX,IIS,SIZE(ZA(IIA:)),SIZE(ZWORK(:)),SIZE(PTRIGS))
 !
 !      3.3     postprocessing
 !              --------------
diff --git a/src/MNH/flat_inv.f90 b/src/MNH/flat_inv.f90
index 502475f0b5fee58b71c9b547949104650026766a..5ac8c5c8e0b87b51e1c7c48edf4c34f432d7a0ce 100644
--- a/src/MNH/flat_inv.f90
+++ b/src/MNH/flat_inv.f90
@@ -1,4 +1,4 @@
-!MNH_LIC Copyright 1994-2022 CNRS, Meteo-France and Universite Paul Sabatier
+!MNH_LIC Copyright 1994-2023 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.
@@ -199,9 +199,6 @@ INTEGER :: IIE_INT,IJE_INT   ! highest indice I  and J values for the x y modes.
 INTEGER :: ILOTX,ILOTY ! number of data vectors along x, y resp. computed 
                        ! in parallel during the FFT process 
 !
-INTEGER :: INC1X,INC1Y ! increment within each data vector for the FFT along
-                       ! x, y resp.
-!
 INTEGER :: INC2X,INC2Y ! increment between the start of one data vector and 
                        ! the next for the FFT along x,y resp.
 !
@@ -327,17 +324,14 @@ END IF
 IF(.NOT. L2D) THEN
 !
   ILOTX = IJX*IKU
-  INC1X = 1
   INC2X = IIX
 !
   ILOTY = IIY*IKU
-  INC1Y = 1
   INC2Y = IJY
 !
 ELSE
 !
   ILOTX = IKU
-  INC1X = 1
   INC2X = IIX*IJX
 ENDIF
 !
@@ -424,7 +418,7 @@ CALL REMAP_2WAY_X_ll(ZY,ZBAND_X,IINFO_ll)
 IF (HLBCX(1) == 'CYCL') THEN
     ZBAND1D( 1 : SIZE(ZBAND_X,1)*SIZE(ZBAND_X,2)*SIZE(ZBAND_X(:,:,IKB-1:),3) ) => ZBAND_X(:,:,IKB-1:)
     ZWORK1D( 1 : SIZE(ZWORKX) ) => ZWORKX(:,:,:)
-    CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC1X, INC2X, IIMAX, ILOTX,-1, &
+    CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX,-1, &
                  SIZE(ZBAND1D), SIZE(ZWORK1D), size(PTRIGSX) )
 ELSE
     CALL FFT55( ZBAND_X(1:,1:,IKB-1:), ZWORKX, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX, -1 )
@@ -445,7 +439,7 @@ IF (.NOT. L2D) THEN
   IF (HLBCY(1) == 'CYCL') THEN
        ZBAND1D( 1 : SIZE(ZBAND_YT,1)*SIZE(ZBAND_YT,2)*SIZE(ZBAND_YT(:,:,IKB-1:),3) ) => ZBAND_YT(:,:,IKB-1:)
        ZWORK1D( 1 : SIZE(ZWORKY) ) => ZWORKY(:,:,:)
-       CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC1Y, INC2Y, IJMAX, ILOTY,-1, &
+       CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC2Y, IJMAX, ILOTY,-1, &
                     SIZE(ZBAND1D), SIZE(ZWORK1D), SIZE(PTRIGSY) )
   ELSE
        CALL FFT55( ZBAND_YT(1:,1:,IKB-1:), ZWORKY, PTRIGSY, KIFAXY, INC2Y, IJMAX, ILOTY, -1 )
@@ -502,7 +496,7 @@ IF (.NOT. L2D) THEN
   IF (HLBCY(1) == 'CYCL') THEN
     ZBAND1D( 1 : SIZE(ZBAND_YRT,1)*SIZE(ZBAND_YRT,2)*SIZE(ZBAND_YRT(:,:,IKB-1:),3) ) => ZBAND_YRT(:,:,IKB-1:)
     ZWORK1D( 1 : SIZE(ZWORKY) ) => ZWORKY(:,:,:)
-    CALL FFT991( ZBAND1D, ZBAND_YRT, PTRIGSY, KIFAXY, INC1Y, INC2Y, IJMAX,ILOTY, +1, &
+    CALL FFT991( ZBAND1D, ZBAND_YRT, PTRIGSY, KIFAXY, INC2Y, IJMAX,ILOTY, +1, &
                  SIZE(ZBAND1D), SIZE(ZWORK1D), SIZE(PTRIGSY) )
   ELSE
     CALL FFT55( ZBAND_YRT(1:,1:,IKB-1:), ZWORKY, PTRIGSY, KIFAXY, INC2Y, IJMAX, ILOTY, +1 )
@@ -522,7 +516,7 @@ CALL REMAP_Y_X_ll(ZBAND_YR,ZBAND_X,IINFO_ll)
 IF (HLBCX(1) == 'CYCL') THEN
   ZBAND1D( 1 : SIZE(ZBAND_X,1)*SIZE(ZBAND_X,2)*SIZE(ZBAND_X(:,:,IKB-1:),3) ) => ZBAND_X(:,:,IKB-1:)
   ZWORK1D( 1 : SIZE(ZWORKX) ) => ZWORKX(:,:,:)
-  CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC1X, INC2X, IIMAX, ILOTX, +1, &
+  CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX, +1, &
                SIZE(ZBAND1D), SIZE(ZWORK1D), SIZE(PTRIGSX) )
 ELSE
   CALL FFT55( ZBAND_X(1:,1:,IKB-1:), ZWORKX, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX, +1 )
diff --git a/src/MNH/flat_invz.f90 b/src/MNH/flat_invz.f90
index 3e4f4358d58553e6c5c744718faa4ce0fc9ec5a8..f1efeaa0986262bc1c1c169d69025579548f4f82 100644
--- a/src/MNH/flat_invz.f90
+++ b/src/MNH/flat_invz.f90
@@ -222,19 +222,13 @@ SUBROUTINE FLAT_INVZ(HLBCX,HLBCY,PDXHATM,PDYHATM,PRHOM,PAF,PBF,PCF,   &
   INTEGER :: ILOTX,ILOTY ! number of data vectors along x, y resp. computed 
   ! in parallel during the FFT process 
   !
-  INTEGER :: INC1X,INC1Y ! increment within each data vector for the FFT along
-  ! x, y resp.
-  !
-  INTEGER :: INC2X,INC2Y ! increment between the start of one data vector and 
+  INTEGER :: INC2X,INC2Y ! increment between the start of one data vector and
   ! the next for the FFT along x,y resp.
   !
   !JUANB
   INTEGER :: ILOT_SX_YP2_ZP1,ILOT_SXP2_Y_ZP1 ! number of data vectors along zx, zy splitting resp. computed 
   ! in parallel during the FFT process 
   !
-  INTEGER :: INC1_SX_YP2_ZP1,INC1_SXP2_Y_ZP1 ! increment within each data vector for the FFT along
-  ! zx, zy splitting resp.
-  !
   INTEGER :: INC2_SX_YP2_ZP1,INC2_SXP2_Y_ZP1 ! increment between the start of one data vector and 
   ! the next for the FFT along zx,zy splitting resp.
   !JUANE
@@ -545,11 +539,9 @@ SUBROUTINE FLAT_INVZ(HLBCX,HLBCY,PDXHATM,PDYHATM,PRHOM,PAF,PBF,PCF,   &
   IF(.NOT. L2D) THEN
      !
      ILOTX = IJX*IKU
-     INC1X = 1
      INC2X = IIX
      !
      ILOTY = IIY*IKU
-     INC1Y = 1
      INC2Y = IJY
      !
      !JUAN Z_SPLITTING !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
@@ -557,18 +549,15 @@ SUBROUTINE FLAT_INVZ(HLBCX,HLBCY,PDXHATM,PDYHATM,PRHOM,PAF,PBF,PCF,   &
      IF (  IAND(NZ_SPLITTING,2) > 0 ) THEN 
         !
         ILOT_SX_YP2_ZP1 = IJ_SX_YP2_ZP1*IK_SX_YP2_ZP1
-        INC1_SX_YP2_ZP1 = 1
         INC2_SX_YP2_ZP1 = II_SX_YP2_ZP1+2
         !
         ILOT_SXP2_Y_ZP1 = II_SXP2_Y_ZP1*IK_SXP2_Y_ZP1
-        INC1_SXP2_Y_ZP1 = 1
         INC2_SXP2_Y_ZP1 = IJ_SXP2_Y_ZP1+2
      END IF !  NZ_SPLITTING
      !JUAN Z_SPLITTING
   ELSE
      !
      ILOTX = IKU
-     INC1X = 1
      INC2X = IIX*IJX
   ENDIF
   !
@@ -683,7 +672,7 @@ CALL PRINT_MSG( NVERB_WARNING, 'GEN', 'FLAT_INVZ', 'OpenACC: IAND(NZ_SPLITTING,1
      IF (HLBCX(1) == 'CYCL') THEN
       ZBAND1D( 1 : SIZE(ZBAND_X,1)*SIZE(ZBAND_X,2)*SIZE(ZBAND_X(:,:,IKB-1:),3) ) => ZBAND_X(:,:,IKB-1:)
       ZWORK1D( 1 : SIZE(ZWORKX) ) => ZWORKX(:,:,:)
-      CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC1X, INC2X, IIMAX, ILOTX,-1, &
+      CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX,-1, &
                    SIZE(ZBAND1D), SIZE(ZWORK1D), size(PTRIGSX) )
      ELSE
         CALL FFT55( ZBAND_X(1:,1:,IKB-1:), ZWORKX, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX, -1 )
@@ -704,7 +693,7 @@ CALL PRINT_MSG( NVERB_FATAL, 'GEN', 'FLAT_INVZ', 'OpenACC: HLBCX(1)==CYCL not po
 #endif
         ZBAND1D( 1 : SIZE(ZBAND_SX_YP2_ZP1) ) => ZBAND_SX_YP2_ZP1(:,:,:)
         ZWORK1D( 1 : SIZE(ZWORK_SX_YP2_ZP1) ) => ZWORK_SX_YP2_ZP1(:,:,:)
-        CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC1_SX_YP2_ZP1, INC2_SX_YP2_ZP1, IIMAX, ILOT_SX_YP2_ZP1, -1, &
+        CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC2_SX_YP2_ZP1, IIMAX, ILOT_SX_YP2_ZP1, -1, &
                      SIZE(ZBAND1D), SIZE(ZWORK1D), size(PTRIGSX) )
         ! move (N+1) values in (2) values to avoid to lost them
         ZBAND_SX_YP2_ZP1(2,:,:)                 =  ZBAND_SX_YP2_ZP1(INC2_SX_YP2_ZP1-1,:,:)
@@ -738,7 +727,7 @@ CALL PRINT_MSG( NVERB_FATAL, 'GEN', 'FLAT_INVZ', 'OpenACC: HLBCX(1)==CYCL not po
         IF (HLBCY(1) == 'CYCL') THEN
           ZBAND1D( 1 : SIZE(ZBAND_YT,1)*SIZE(ZBAND_YT,2)*SIZE(ZBAND_YT(:,:,IKB-1:),3) ) => ZBAND_YT(:,:,IKB-1:)
           ZWORK1D( 1 : SIZE(ZWORKY) ) => ZWORKY(:,:,:)
-          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC1Y, INC2Y, IJMAX, ILOTY,-1, &
+          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC2Y, IJMAX, ILOTY,-1, &
                        SIZE(ZBAND1D), SIZE(ZWORK1D), SIZE(PTRIGSY) )
         ELSE
            CALL FFT55( ZBAND_YT(1:,1:,IKB-1:), ZWORKY, PTRIGSY, KIFAXY, INC2Y, IJMAX, ILOTY, -1 )
@@ -760,7 +749,7 @@ CALL PRINT_MSG( NVERB_FATAL, 'GEN', 'FLAT_INVZ', 'OpenACC: HLBCY(1)==CYCL not po
 #endif
           ZBAND1D( 1 : SIZE(ZBAND_SXP2_Y_ZP1T) ) => ZBAND_SXP2_Y_ZP1T(:,:,:)
           ZWORK1D( 1 : SIZE(ZWORK_SXP2_Y_ZP1) )  => ZWORK_SXP2_Y_ZP1(:,:,:)
-          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC1_SXP2_Y_ZP1, INC2_SXP2_Y_ZP1, IJMAX, ILOT_SXP2_Y_ZP1, -1, &
+          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC2_SXP2_Y_ZP1, IJMAX, ILOT_SXP2_Y_ZP1, -1, &
                        SIZE(ZBAND1D), SIZE(ZWORK1D), size(PTRIGSY) )
            ! move (N+1) values in (2) values to avoid to lost them
            ZBAND_SXP2_Y_ZP1T(2,:,:)                 = ZBAND_SXP2_Y_ZP1T(INC2_SXP2_Y_ZP1-1,:,:)
@@ -898,7 +887,7 @@ CALL PRINT_MSG( NVERB_WARNING, 'GEN', 'FLAT_INVZ', 'L2D=T not tested' )
         IF (HLBCY(1) == 'CYCL') THEN
           ZBAND1D( 1 : SIZE(ZBAND_YRT,1)*SIZE(ZBAND_YRT,2)*SIZE(ZBAND_YRT(:,:,IKB-1:),3) ) => ZBAND_YRT(:,:,IKB-1:)
           ZWORK1D( 1 : SIZE(ZWORKY) ) => ZWORKY(:,:,:)
-          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC1Y, INC2Y, IJMAX, ILOTY, +1, &
+          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC2Y, IJMAX, ILOTY, +1, &
                        SIZE(ZBAND1D), SIZE(ZWORK1D), SIZE(PTRIGSY) )
         ELSE
            CALL FFT55( ZBAND_YRT(1:,1:,IKB-1:), ZWORKY, PTRIGSY, KIFAXY, INC2Y, IJMAX, ILOTY, +1 )
@@ -918,7 +907,7 @@ CALL PRINT_MSG( NVERB_WARNING, 'GEN', 'FLAT_INVZ', 'L2D=T not tested' )
      IF (HLBCX(1) == 'CYCL') THEN
         ZBAND1D( 1 : SIZE(ZBAND_X,1)*SIZE(ZBAND_X,2)*SIZE(ZBAND_X(:,:,IKB-1:),3) ) => ZBAND_X(:,:,IKB-1:)
         ZWORK1D( 1 : SIZE(ZWORKX) ) => ZWORKX(:,:,:)
-        CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC1X, INC2X, IIMAX, ILOTX, +1, &
+        CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX, +1, &
                      SIZE(ZBAND1D), SIZE(ZWORK1D), SIZE(PTRIGSX) )
      ELSE
         CALL FFT55( ZBAND_X(1:,1:,IKB-1:), ZWORKX, PTRIGSX, KIFAXX, INC2X, IIMAX, ILOTX, +1 )
@@ -955,7 +944,7 @@ CALL PRINT_MSG( NVERB_WARNING, 'GEN', 'FLAT_INVZ', 'L2D=T not tested' )
 !$acc end kernels
           ZBAND1D( 1 : SIZE(ZBAND_SXP2_Y_ZP1RT) ) => ZBAND_SXP2_Y_ZP1RT(:,:,:)
           ZWORK1D( 1 : SIZE(ZWORK_SXP2_Y_ZP1) )   => ZWORK_SXP2_Y_ZP1(:,:,:)
-          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC1_SXP2_Y_ZP1, INC2_SXP2_Y_ZP1, IJMAX, &
+          CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSY, KIFAXY, INC2_SXP2_Y_ZP1, IJMAX, &
                        ILOT_SXP2_Y_ZP1, +1, SIZE(ZBAND1D), SIZE(ZWORK1D), size(PTRIGSY) )
         ELSE
            CALL FFT55( ZBAND_SXP2_Y_ZP1RT, ZWORK_SXP2_Y_ZP1, PTRIGSY, KIFAXY, INC2_SXP2_Y_ZP1, IJMAX, ILOT_SXP2_Y_ZP1, +1 )
@@ -983,7 +972,7 @@ CALL PRINT_MSG( NVERB_WARNING, 'GEN', 'FLAT_INVZ', 'L2D=T not tested' )
 !$acc end kernels
         ZBAND1D( 1 : SIZE(ZBAND_SX_YP2_ZP1) ) => ZBAND_SX_YP2_ZP1(:,:,:)
         ZWORK1D( 1 : SIZE(ZWORK_SX_YP2_ZP1) ) => ZWORK_SX_YP2_ZP1(:,:,:)
-        CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC1_SX_YP2_ZP1, INC2_SX_YP2_ZP1, IIMAX, &
+        CALL FFT991( ZBAND1D, ZWORK1D, PTRIGSX, KIFAXX, INC2_SX_YP2_ZP1, IIMAX, &
                      ILOT_SX_YP2_ZP1, +1, SIZE(ZBAND1D), SIZE(ZWORK1D), size(PTRIGSX) )
      ELSE
         CALL FFT55( ZBAND_SX_YP2_ZP1, ZWORK_SX_YP2_ZP1, PTRIGSX, KIFAXX, INC2_SX_YP2_ZP1, IIMAX, ILOT_SX_YP2_ZP1, +1 )