diff --git a/examples/src/example2-f.f90 b/examples/src/example2-f.f90
index 746529f..2226aad 100644
--- a/examples/src/example2-f.f90
+++ b/examples/src/example2-f.f90
@@ -31,7 +31,9 @@ program main
 subroutine fn_input(coord, n, val)
   implicit none
   integer*8 :: n, i, dof
-  real*8 :: coord(n*3), val(n*3), L, r_2
+  real*8, intent(in) :: coord(n*3)
+  real*8, intent(out) :: val(n*3)
+  real*8 :: L, r_2
 
   dof = 3
   L = 125
@@ -46,7 +48,9 @@ subroutine fn_input(coord, n, val)
 subroutine fn_poten(coord, n, val)
   implicit none
   integer*8 :: n, i, dof
-  real*8 :: coord(n*3), val(n*3), L, r_2
+  real*8, intent(in) :: coord(n*3)
+  real*8, intent(out) :: val(n*3)
+  real*8 :: L, r_2
 
   dof = 3
   L = 125
diff --git a/include/fmm_pts.txx b/include/fmm_pts.txx
index 9d0bcc9..49cfc2b 100644
--- a/include/fmm_pts.txx
+++ b/include/fmm_pts.txx
@@ -1073,9 +1073,6 @@ Matrix<typename FMMNode::Real_t>& FMM_Pts<FMMNode>::Precomp(int level, Mat_Type
 
           int xlow,xhigh,ylow,yhigh,zlow,zhigh;
           switch(mat_indx){
-          case BoundaryType::FreeSpace :
-            xlow=0;xhigh=0;ylow=0;yhigh=0;zlow=0;zhigh=0;
-            break;
           case BoundaryType::PX :
             xlow=-2;xhigh=2;
             ylow=0;yhigh=0;
@@ -1091,6 +1088,9 @@ Matrix<typename FMMNode::Real_t>& FMM_Pts<FMMNode>::Precomp(int level, Mat_Type
             ylow=-2;yhigh=2;
             zlow=-2;zhigh=2;
             break;
+          default:
+            xlow=0;xhigh=0;ylow=0;yhigh=0;zlow=0;zhigh=0;
+            break;
           }
 
           for(int x0=xlow;x0<=xhigh;x0++)
diff --git a/include/mpi_tree.txx b/include/mpi_tree.txx
index d32f346..5d50ea0 100644
--- a/include/mpi_tree.txx
+++ b/include/mpi_tree.txx
@@ -1165,6 +1165,11 @@ void MPI_Tree<TreeNode>::SetColleagues(BoundaryType bndry, Node_t* node){
             ylow=-1;yhigh=+1;
             zlow=0;zhigh=0;
             break;
+          default:
+            xlow=0;xhigh=0;
+            ylow=0;yhigh=0;
+            zlow=0;zhigh=0;
+            break;
           }
 
         for(long i0=xlow;i0<=xhigh;i0++)
diff --git a/src/pvfmm-wrapper.cpp b/src/pvfmm-wrapper.cpp
index 5d8f43b..f84979c 100644
--- a/src/pvfmm-wrapper.cpp
+++ b/src/pvfmm-wrapper.cpp
@@ -6,6 +6,12 @@
 extern "C" { // Volume FM
 #endif
 
+#ifdef PVFMM_EXTENDED_BC
+#define PVFMM_FULL_PERIODIC pvfmm::PXYZ
+#else
+#define PVFMM_FULL_PERIODIC pvfmm::Periodic
+#endif
+
 void* PVFMMCreateVolumeFMMF(int m, int q, enum PVFMMKernel kernel, MPI_Comm comm) {
   const pvfmm::Kernel<float>* ker = nullptr;
   if (kernel == PVFMMLaplacePotential   ) ker = &pvfmm::LaplaceKernel   <float>::potential();
@@ -30,7 +36,7 @@ void* PVFMMCreateVolumeTreeF(int cheb_deg, int data_dim, void (*fn_ptr)(const fl
     fn_ptr(coord, n, out, fn_ctx);
   };
 
-  auto* tree = ChebFMM_CreateTree(cheb_deg, data_dim, fn_ptr_, trg_coord_, comm, tol, max_pts, periodic?pvfmm::Periodic:pvfmm::FreeSpace, init_depth);
+  auto* tree = ChebFMM_CreateTree(cheb_deg, data_dim, fn_ptr_, trg_coord_, comm, tol, max_pts, periodic?PVFMM_FULL_PERIODIC:pvfmm::FreeSpace, init_depth);
   //tree->Write2File("vis",4);
 
   return (void*)tree;
@@ -46,7 +52,7 @@ void* PVFMMCreateVolumeTreeFromCoeffF(long n_nodes, int cheb_deg, int data_dim,
   #pragma omp parallel for schedule(static)
   for (long i = 0; i < (long)trg_coord_.size(); i++) trg_coord_[i] = trg_coord[i];
 
-  auto* tree = ChebFMM_CreateTree(cheb_deg, node_coord_, fn_coeff_, trg_coord_, comm, periodic?pvfmm::Periodic:pvfmm::FreeSpace);
+  auto* tree = ChebFMM_CreateTree(cheb_deg, node_coord_, fn_coeff_, trg_coord_, comm, periodic?PVFMM_FULL_PERIODIC:pvfmm::FreeSpace);
   //tree->Write2File("vis",4);
 
   return (void*)tree;
@@ -138,7 +144,7 @@ void* PVFMMCreateVolumeTreeD(int cheb_deg, int data_dim, void (*fn_ptr)(const do
     fn_ptr(coord, n, out, fn_ctx);
   };
 
-  auto* tree = ChebFMM_CreateTree(cheb_deg, data_dim, fn_ptr_, trg_coord_, comm, tol, max_pts, periodic?pvfmm::Periodic:pvfmm::FreeSpace, init_depth);
+  auto* tree = ChebFMM_CreateTree(cheb_deg, data_dim, fn_ptr_, trg_coord_, comm, tol, max_pts, periodic?PVFMM_FULL_PERIODIC:pvfmm::FreeSpace, init_depth);
   //tree->Write2File("vis",4);
 
   return (void*)tree;
@@ -154,7 +160,7 @@ void* PVFMMCreateVolumeTreeFromCoeffD(long n_nodes, int cheb_deg, int data_dim,
   #pragma omp parallel for schedule(static)
   for (long i = 0; i < (long)trg_coord_.size(); i++) trg_coord_[i] = trg_coord[i];
 
-  auto* tree = ChebFMM_CreateTree(cheb_deg, node_coord_, fn_coeff_, trg_coord_, comm, periodic?pvfmm::Periodic:pvfmm::FreeSpace);
+  auto* tree = ChebFMM_CreateTree(cheb_deg, node_coord_, fn_coeff_, trg_coord_, comm, periodic?PVFMM_FULL_PERIODIC:pvfmm::FreeSpace);
   //tree->Write2File("vis",4);
 
   return (void*)tree;
@@ -242,7 +248,7 @@ void pvfmmcreatevolumetreef_(void** ctx, const int32_t* cheb_deg, const int32_t*
   };
 
   const MPI_Comm comm = MPI_Comm_f2c(*fcomm);
-  auto* tree = ChebFMM_CreateTree(*cheb_deg, *data_dim, fn_ptr_, trg_coord_, comm, *tol, *max_pts, (*periodic)==0?pvfmm::FreeSpace:pvfmm::Periodic, *init_depth);
+  auto* tree = ChebFMM_CreateTree(*cheb_deg, *data_dim, fn_ptr_, trg_coord_, comm, *tol, *max_pts, (*periodic)==0?pvfmm::FreeSpace:PVFMM_FULL_PERIODIC, *init_depth);
   //tree->Write2File("vis",4);
 
   (*ctx) = (void*)tree;
@@ -304,7 +310,7 @@ void pvfmmcreatevolumetreed_(void** ctx, const int32_t* cheb_deg, const int32_t*
   };
 
   const MPI_Comm comm = MPI_Comm_f2c(*fcomm);
-  auto* tree = ChebFMM_CreateTree(*cheb_deg, *data_dim, fn_ptr_, trg_coord_, comm, *tol, *max_pts, (*periodic)==0?pvfmm::FreeSpace:pvfmm::Periodic, *init_depth);
+  auto* tree = ChebFMM_CreateTree(*cheb_deg, *data_dim, fn_ptr_, trg_coord_, comm, *tol, *max_pts, (*periodic)==0?pvfmm::FreeSpace:PVFMM_FULL_PERIODIC, *init_depth);
   //tree->Write2File("vis",4);
 
   (*ctx) = (void*)tree;