diff --git a/model/src/PDLIB/yowelementpool.F90 b/model/src/PDLIB/yowelementpool.F90
index f1f06b293a..cbd2cc4d41 100644
--- a/model/src/PDLIB/yowelementpool.F90
+++ b/model/src/PDLIB/yowelementpool.F90
@@ -71,7 +71,7 @@ module yowElementpool
   !> conversione: If a element is connected to domain 1,2 and 3. It belongs to 1,2 and 3.
   !> @param[in] rank optional. If not given, datapool:myrank is used
   function belongTo(ele_in, rank)
-    use yowDatapool, only: myrank, nTasks
+    use yowDatapool, only: myrank
     use yowNodepool, only: t_Node, nodes_global
     implicit none
     integer, intent(in) :: ele_in(3)
@@ -79,7 +79,6 @@ function belongTo(ele_in, rank)
     logical :: belongTo
 
     integer :: myDomainID
-    integer :: nodes(3)
     integer J
 
     if(present(rank) .eqv. .true.) then
diff --git a/model/src/PDLIB/yowexchangeModule.F90 b/model/src/PDLIB/yowexchangeModule.F90
index 630270d155..1fd4e0539c 100644
--- a/model/src/PDLIB/yowexchangeModule.F90
+++ b/model/src/PDLIB/yowexchangeModule.F90
@@ -151,7 +151,7 @@ subroutine createMPIType(this)
     use yowerr
     use mpi_f08
     use yowNodepool, only: ghostgl, np, ipgl
-    use yowDatapool, only: rtype, itype
+    use yowDatapool, only: rtype
     implicit none
     class(t_neighborDomain), intent(inout) :: this
 
@@ -249,7 +249,7 @@ end subroutine createMPITypes
   !> \note MPI send tag: 10000 + neighbor MPI rank
   subroutine PDLIB_exchange1Dreal(U)
     use yowDatapool, only: comm, myrank, rkind
-    use yowNodepool, only: t_Node, nodes_global, np, ng, ghosts, npa
+    use yowNodepool, only: t_Node, ghosts, npa
     use yowerr
     use mpi_f08
     implicit none
@@ -302,10 +302,12 @@ end subroutine PDLIB_exchange1Dreal
   !> \note MPI send tag: 30000 + neighbor MPI rank
   subroutine PDLIB_exchange2Dreal(U)
     use yowDatapool, only: comm, myrank, rkind
-    use yowNodepool, only: t_Node, nodes_global, np, ng, ghosts, npa
+    use yowNodepool, only: t_Node, ghosts
     use yowerr
     use mpi_f08
+#ifdef W3_DEBUGEXCH
     USE W3ODATMD, only : IAPROC
+#endif
     implicit none
     real(kind=rkind), intent(inout) :: U(:,:)
 
@@ -417,7 +419,6 @@ subroutine PDLIB_exchange1Dreal_zero(U)
     integer :: i, ierr, tag
     type(MPI_REQUEST) :: sendRqst(nConnDomains), recvRqst(nConnDomains)
     type(MPI_STATUS)  :: recvStat(nConnDomains), sendStat(nConnDomains)
-    character(len=200) errstr
 
     ! It is impossible to add these range checks because assumed shape array start vom 1:npa+1 even if you allocate it from 0:npa
 
@@ -487,7 +488,6 @@ subroutine PDLIB_exchange2Dreal_zero(U)
     integer :: i, ierr, tag
     type(MPI_REQUEST) :: sendRqst(nConnDomains), recvRqst(nConnDomains)
     type(MPI_STATUS)  :: recvStat(nConnDomains), sendStat(nConnDomains)
-    character(len=200) errstr
 
     ! It is impossible to add these range checks because assumed shape array start vom 1:npa+1 even if you allocate it from 0:npa
     !     if(size(U,2) /= npa+1) then
diff --git a/model/src/PDLIB/yowfunction.F90 b/model/src/PDLIB/yowfunction.F90
index 29bdd78c06..d119a4c587 100644
--- a/model/src/PDLIB/yowfunction.F90
+++ b/model/src/PDLIB/yowfunction.F90
@@ -55,12 +55,15 @@ END SUBROUTINE PDLIB_ABORT
   !*                                                                    *
   !**********************************************************************
   SUBROUTINE ComputeListNP_ListNPA_ListIPLG_Kernel
-    USE W3ODATMD, only : IAPROC, NAPROC, NTPROC
+    USE W3ODATMD, only : IAPROC, NAPROC
     USE W3ADATMD, ONLY: MPI_COMM_WCMP
-    USE yowDatapool, only: rtype, istatus
+    USE yowDatapool, only: istatus
     USE yowNodepool, only: npa, np, iplg
     USE yowNodepool, only: ListNP, ListNPA, ListIPLG
     use mpi_f08
+#ifdef W3_DEBUGINIT
+    USE W3ODATMD, only : NTPROC
+#endif
     IMPLICIT NONE
     integer IPROC, idx, IP, len, istat, sumNP, ierr
     integer, allocatable :: iVect(:)
@@ -195,8 +198,7 @@ END SUBROUTINE ComputeListNP_ListNPA_ListIPLG_Kernel
   SUBROUTINE ComputeListNP_ListNPA_ListIPLG
     USE W3ODATMD, only : IAPROC, NAPROC, NTPROC
     USE W3ADATMD, ONLY: MPI_COMM_WAVE
-    USE yowDatapool, only: rtype, istatus
-    USE yowNodepool, only: npa, np, iplg
+    USE yowDatapool, only: istatus
     USE yowNodepool, only: ListNP, ListNPA, ListIPLG
     use mpi_f08
     IMPLICIT NONE
@@ -281,9 +283,9 @@ END SUBROUTINE ComputeListNP_ListNPA_ListIPLG
   !*                                                                    *
   !**********************************************************************
   SUBROUTINE ComputeBoundaryInformation
-    use yowNodepool, only: ListNP, ListNPA, ListIPLG
+    use yowNodepool, only: ListNPA, ListIPLG
     USE W3GDATMD, ONLY: IOBP
-    USE W3ODATMD, only : IAPROC, NAPROC
+    USE W3ODATMD, only : NAPROC
     IMPLICIT NONE
     integer ListFirst(NAPROC), NbSend(NAPROC)
     integer IPROC, eSend, IP, IP_glob, NPAloc
diff --git a/model/src/PDLIB/yowpdlibmain.F90 b/model/src/PDLIB/yowpdlibmain.F90
index 193c6c17c3..97e934e2fa 100644
--- a/model/src/PDLIB/yowpdlibmain.F90
+++ b/model/src/PDLIB/yowpdlibmain.F90
@@ -65,17 +65,17 @@ module yowpdlibMain
   subroutine initFromGridDim(MNP, MNE, INE_global, secDim, MPIcomm)
     use mpi_f08,           only: MPI_COMM
     use yowDatapool,       only: myrank, debugPrePartition, debugPostPartition
-    use yowNodepool,       only: np_global, np, np_perProcSum, ng, ipgl, iplg, npa
+    use yowNodepool,       only: np_global, np, np_perProcSum, ng
     use yowElementpool,    only: ne_global,ne
     use yowSidepool,       only: ns, ns_global
     use yowExchangeModule, only: nConnDomains, setDimSize
-    use yowRankModule,     only: initRankModule, ipgl_npa
+    use yowRankModule,     only: initRankModule
 
     integer, intent(in) :: MNP, MNE
     integer, intent(in) :: INE_global(3,MNE)
     integer, intent(in) :: secDim
     type(MPI_COMM), intent(in) :: MPIcomm
-    integer :: istat, memunit
+    integer :: memunit
 
     ! note: myrank=0 until after initMPI is called, so only rank=0 file
     ! contains the 'section 1' information
@@ -433,12 +433,16 @@ subroutine runParmetis(MNP)
     ! Parmetis
     ! Node neighbor information
     integer :: wgtflag, numflag, ndims, nparts, edgecut, ncon
-    integer, allocatable :: xadj(:), part(:), vwgt(:), adjwgt(:), vtxdist(:), options(:), adjncy(:), iweights(:)
+    integer, allocatable :: xadj(:), part(:), vwgt(:), adjwgt(:), vtxdist(:), options(:), adjncy(:)
+#ifdef WEIGHTS
+    integer, allocatable :: iweights(:)
+    integer :: itmp
+    logical :: lexist = .false.
+#endif
     ! parmetis need single precision
     real(4), allocatable :: xyz(:), tpwgts(:), ubvec(:)
-    integer :: IP_glob, itmp
+    integer :: IP_glob
     integer :: ref
-    logical :: lexist = .false.
     ! Node to domain mapping.
     ! np_global long. give the domain number for die global node number
     integer, allocatable :: node2domain(:)
@@ -1018,7 +1022,7 @@ end subroutine findGhostNodes
   subroutine findConnDomains
     use yowerr,          only: parallel_abort
     use yowNodepool,       only: ghosts, ng, t_Node
-    use yowDatapool,       only: nTasks, myrank
+    use yowDatapool,       only: nTasks
     use yowExchangeModule, only: neighborDomains, initNbrDomains
 
     integer :: i, stat, itemp
@@ -1102,7 +1106,7 @@ end subroutine findConnDomains
   subroutine exchangeGhostIds
     use yowerr
     use yowNodepool,       only: np, t_node, nodes
-    use yowDatapool,       only: nTasks, myrank, comm
+    use yowDatapool,       only: myrank, comm
     use yowExchangeModule, only: neighborDomains, nConnDomains, createMPITypes
     use mpi_f08
 
@@ -1232,7 +1236,7 @@ subroutine postPartition2(INE_global)
     use yowElementpool, only: ne, ne_global, INE, belongto, ielg
     use yowerr,         only: parallel_abort
     use yowDatapool,    only: myrank
-    use yowNodepool,    only: np_global, np, nodes_global, iplg, t_Node, ghostlg, ng, npa
+    use yowNodepool,    only: np, nodes_global, iplg, t_Node, ghostlg, ng, npa
     use yowNodepool,    only: x, y, z
     use w3gdatmd,       only: xgrd, ygrd, zb
 
@@ -1352,12 +1356,11 @@ end subroutine postPartition2
   !*                                                                    *
   !**********************************************************************
   subroutine ComputeTRIA_IEN_SI_CCON
-    use yowElementpool, only: ne, ne_global, INE, ielg
+    use yowElementpool, only: ne, INE
     use yowExchangeModule, only : PDLIB_exchange1Dreal
     use yowerr,       only: parallel_abort
-    use yowDatapool,    only: myrank
-    use yowNodepool,    only: np_global, np, iplg, t_Node, ghostlg, ng, npa
-    use yowNodepool,    only: x, y, z, PDLIB_SI, PDLIB_IEN, PDLIB_TRIA, PDLIB_CCON, PDLIB_TRIA03
+    use yowNodepool,    only: t_Node, npa
+    use yowNodepool,    only: x, y, PDLIB_SI, PDLIB_IEN, PDLIB_TRIA, PDLIB_CCON, PDLIB_TRIA03
 
     integer I1, I2, I3, stat, IE, NI(3)
     real  :: DXP1, DXP2, DXP3, DYP1, DYP2, DYP3, DBLTMP, TRIA03
@@ -1452,10 +1455,9 @@ end subroutine CORRECT_DX_GT180
   !*                                                                    *
   !**********************************************************************
   subroutine ComputeIA_JA_POSI_NNZ
-    use yowElementpool, only: ne, ne_global, INE, ielg
+    use yowElementpool, only: ne, INE
     use yowerr,       only: parallel_abort
-    use yowDatapool,    only: myrank
-    use yowNodepool,    only: np_global, np, nodes_global, iplg, t_Node, ghostlg, ng, npa
+    use yowNodepool,    only: t_Node, npa
     use yowNodepool,    only: PDLIB_CCON, PDLIB_IA, PDLIB_JA, PDLIB_JA_IE, PDLIB_IA_P, PDLIB_JA_P
     use yowNodepool,    only: PDLIB_NNZ, PDLIB_POSI, PDLIB_IE_CELL, PDLIB_POS_CELL, PDLIB_IE_CELL2
     use yowNodepool,    only: PDLIB_POS_CELL2, PDLIB_I_DIAG
diff --git a/model/src/PDLIB/yowrankModule.F90 b/model/src/PDLIB/yowrankModule.F90
index 8674ae6e3b..208cf7ea78 100644
--- a/model/src/PDLIB/yowrankModule.F90
+++ b/model/src/PDLIB/yowrankModule.F90
@@ -73,7 +73,7 @@ module yowRankModule
 
   !> allocate and exchange
   subroutine initRankModule()
-    use yowDatapool, only: nTasks, myrank
+    use yowDatapool, only: nTasks
     implicit none
     integer :: stat
 
@@ -235,7 +235,7 @@ end subroutine exchangeIPLG
 
   !> \internal
   subroutine calcISTART()
-    use yowDatapool, only: nTasks, myrank
+    use yowDatapool, only: nTasks
     implicit none
     integer :: ir