diff --git a/.github/workflows/clang-tidy.yml b/.github/workflows/clang-tidy.yml
index 784e8f71..26c7b639 100644
--- a/.github/workflows/clang-tidy.yml
+++ b/.github/workflows/clang-tidy.yml
@@ -105,7 +105,7 @@ jobs:
       with:
         repo-name: 'meshFields-openmpi'
         repo-path: 'SCOREC/meshFields'
-        repo-ref: 'b1482bbba288df210784b2345eae08e34faabdc4'
+        repo-ref: 'b9984520c20f73955a3b4e25e4907780b91d430f'
         cache: true
         options: '-DCMAKE_CXX_COMPILER=`which mpicxx`
                   -DCMAKE_C_COMPILER=`which mpicc`
diff --git a/.github/workflows/cmake-test.yml b/.github/workflows/cmake-test.yml
index d736a952..6f2e4f2d 100644
--- a/.github/workflows/cmake-test.yml
+++ b/.github/workflows/cmake-test.yml
@@ -132,7 +132,7 @@ jobs:
       with:
         repo-name: 'meshFields'
         repo-path: 'SCOREC/meshFields'
-        repo-ref: 'b1482bbba288df210784b2345eae08e34faabdc4'
+        repo-ref: 'b9984520c20f73955a3b4e25e4907780b91d430f'
         cache: true
         cache-suffix: ${{ matrix.python_api == 'ON' && '-shared' || '' }}
         options: '-DCMAKE_CXX_COMPILER=`which mpicxx`
diff --git a/src/pcms/field/evaluator/mesh_fields_backend.h b/src/pcms/field/evaluator/mesh_fields_backend.h
index 84eb206d..04f81c2a 100644
--- a/src/pcms/field/evaluator/mesh_fields_backend.h
+++ b/src/pcms/field/evaluator/mesh_fields_backend.h
@@ -6,6 +6,7 @@
 
 #include <Kokkos_Core.hpp>
 #include <MeshField.hpp>
+#include <MeshField_Config.hpp>
 #include <memory>
 
 #include "pcms/field/layout/mesh_fields.h"
@@ -53,7 +54,7 @@ class MeshFieldBackendImpl : public MeshFieldBackend<T>
   {
     auto self = const_cast<MeshFieldBackendImpl<T, Dim, Order>*>(this);
     return self->mesh_field_.triangleLocalPointEval(localCoords, offsets,
-                                                    shape_field_);
+                                                    shape_field_.field);
   }
 
   void SetData(Rank1View<const T, DeviceMemorySpace> data, size_t num_nodes,
@@ -65,7 +66,7 @@ class MeshFieldBackendImpl : public MeshFieldBackend<T>
       mesh_.nents(dim), KOKKOS_CLASS_LAMBDA(size_t ent) {
         for (size_t n = 0; n < num_nodes; ++n) {
           for (size_t c = 0; c < num_components; ++c) {
-            shape_field_(ent, n, c, topo) =
+            shape_field_.field(ent, n, c, topo) =
               data[ent * stride + n * num_components + c];
           }
         }
@@ -82,7 +83,7 @@ class MeshFieldBackendImpl : public MeshFieldBackend<T>
         for (size_t n = 0; n < num_nodes; ++n) {
           for (size_t c = 0; c < num_components; ++c) {
             data[ent * stride + n * num_components + c] =
-              shape_field_(ent, n, c, topo);
+              shape_field_.field(ent, n, c, topo);
           }
         }
       });
@@ -91,9 +92,8 @@ class MeshFieldBackendImpl : public MeshFieldBackend<T>
 private:
   Omega_h::Mesh& mesh_;
   MeshField::OmegahMeshField<DefaultExecutionSpace, Dim> mesh_field_;
-  using ShapeField =
-    decltype(mesh_field_.template CreateLagrangeField<T, Order, 1>());
-  ShapeField shape_field_;
+  using FWC = decltype(mesh_field_.template CreateLagrangeField<T, Order, 1>());
+  FWC shape_field_; // FWC = FieldWithController; keeps ctrlr alive
 };
 
 // ---------------------------------------------------------------------------
@@ -240,7 +240,7 @@ struct FillCoordinatesAndIndicesFunctor
     const auto owner_idx = owning_elem_ids_(i);
     LO count = Kokkos::atomic_sub_fetch(&elem_counts_(owner_idx), 1);
     LO index = offsets_(owner_idx) + count - 1;
-    for (int j = 0; j < (dim_ + 1); ++j) {
+    for (int j = 0; j < dim_; ++j) {
       coordinates_(index, j) = coord[j];
     }
     indices_(index) = i;
@@ -404,8 +404,9 @@ struct FillCoordinatesDeviceFunctor
                                    global_coords_(orig_idx, 1)};
     const auto local =
       Omega_h::barycentric_from_global<2, 2>(point, vertex_coords);
-    for (int j = 0; j < (dim_ + 1); ++j)
+    for (int j = 0; j < dim_; ++j) {
       coordinates_(index, j) = local[j];
+    }
     indices_(index) = orig_idx;
   }
 };
@@ -495,7 +496,7 @@ struct MeshFieldsAdapter2LocalizationHint
 
     offsets_ = Kokkos::View<LO*, HostMemorySpace>("offsets", mesh.nelems() + 1);
     coordinates_ = Kokkos::View<Real**, HostMemorySpace>(
-      "coordinates", num_valid_, mesh.dim() + 1);
+      "coordinates", num_valid_, mesh.dim());
     indices_ = Kokkos::View<LO*, HostMemorySpace>("indices", num_valid_);
 
     if (num_missing_ > 0) {
@@ -537,8 +538,9 @@ struct MeshFieldsAdapter2LocalizationHint
                                      global_coords(orig_idx, 1)};
       const auto local =
         Omega_h::barycentric_from_global<2, 2>(point, vertex_coords);
-      for (int j = 0; j < (mesh.dim() + 1); ++j)
+      for (int j = 0; j < mesh.dim(); ++j) {
         coordinates_(index, j) = local[j];
+      }
       indices_(index) = static_cast<LO>(orig_idx);
     }
 
@@ -632,7 +634,7 @@ struct MeshFieldsAdapter2LocalizationHint
 
     // Step 6: Fill coordinates and indices on device
     coordinates_d_ =
-      Kokkos::View<Real**>("coordinates_d", num_valid_, mesh.dim() + 1);
+      Kokkos::View<Real**>("coordinates_d", num_valid_, mesh.dim());
     indices_d_ = Kokkos::View<LO*>("indices_d", num_valid_);
     const auto tris2verts = mesh.ask_elem_verts();
     const auto mesh_coords = mesh.coords();
@@ -654,7 +656,7 @@ struct MeshFieldsAdapter2LocalizationHint
     // Create host mirrors for compatibility (lazy copy - only if needed)
     offsets_ = Kokkos::create_mirror_view(offsets_d_);
     coordinates_ = Kokkos::View<Real**, HostMemorySpace>(
-      "coordinates_", num_valid_, mesh.dim() + 1);
+      "coordinates_", num_valid_, mesh.dim());
     DeepCopyMismatchLayouts(coordinates_, coordinates_d_);
     indices_ = Kokkos::create_mirror_view(indices_d_);
     if (num_missing_ > 0) {
@@ -681,4 +683,4 @@ struct MeshFieldsAdapter2LocalizationHint
 
 } // namespace pcms
 
-#endif // PCMS_ADAPTER_MESHFIELDS_MESH_FIELDS_BACKEND_H
+#endif // PCMS_ADAPTER_MESHFIELDS_MESH_FIELDS_BACKEND_H
\ No newline at end of file
diff --git a/src/pcms/transfer/mass_matrix_integrator.hpp b/src/pcms/transfer/mass_matrix_integrator.hpp
index 7d36c975..b3031ff0 100644
--- a/src/pcms/transfer/mass_matrix_integrator.hpp
+++ b/src/pcms/transfer/mass_matrix_integrator.hpp
@@ -3,6 +3,7 @@
 
 #include <KokkosController.hpp>
 #include <MeshField.hpp>
+#include <MeshField_Config.hpp>
 #include <MeshField_Element.hpp>
 #include <MeshField_Fail.hpp>
 #include <MeshField_For.hpp>
@@ -38,7 +39,7 @@ class MassMatrixIntegrator : public MeshField::Integrator
     // std::cerr << " Number points per Elem : " << numPtsPerElem << "\n";
     assert(numPtsPerElem >= 1);
     const size_t ptDim = p.extent(1);
-    assert(ptDim == fe.MeshEntDim + 1);
+    assert(ptDim == fe.MeshEntDim);
     // Copy values needed in the kernel to avoid capturing host references
     // (mesh and fe are host objects and cannot be dereferenced on the device)
     const auto numElems = mesh.nelems();
@@ -51,8 +52,7 @@ class MassMatrixIntegrator : public MeshField::Integrator
         const auto last = first + numPtsPerElem;
         for (auto pt = first; pt < last; pt++) {
           // FIXME better way to fill? pass kokkos::subview to getValues?
-          Kokkos::Array<MeshField::Real, FieldElement::MeshEntDim + 1>
-            localCoord;
+          Kokkos::Array<MeshField::Real, FieldElement::MeshEntDim> localCoord;
           for (auto i = 0; i < localCoord.size(); i++) {
             localCoord[i] = p(pt, i);
           }
diff --git a/src/pcms/transfer/omega_h_form_integrator_utils.hpp b/src/pcms/transfer/omega_h_form_integrator_utils.hpp
index 23f5e35d..e40768f5 100644
--- a/src/pcms/transfer/omega_h_form_integrator_utils.hpp
+++ b/src/pcms/transfer/omega_h_form_integrator_utils.hpp
@@ -7,6 +7,7 @@
 #include "pcms/utility/assert.h"
 #include <MeshField_Integrate.hpp>
 #include <MeshField_Shape.hpp>
+#include <MeshField_Config.hpp>
 #include <Omega_h_shape.hpp>
 #include <Kokkos_MathematicalFunctions.hpp>
 
@@ -72,13 +73,15 @@ inline void CheckOmegaHScalarLagrangeLayout(
 }
 
 [[nodiscard]] OMEGA_H_INLINE Omega_h::Vector<2> GlobalFromBarycentric(
-  const MeshField::Vector3& barycentric_coord,
+  const MeshField::Vector2& barycentric_coord,
   const Omega_h::Few<Omega_h::Vector<2>, 3>& verts_coord)
 {
   Omega_h::Vector<2> real_coords = {0.0, 0.0};
+  const Omega_h::Real xi3 = 1.0 - barycentric_coord[0] - barycentric_coord[1];
+  const Omega_h::Real xi[3] = {barycentric_coord[0], barycentric_coord[1], xi3};
   for (int i = 0; i < 3; ++i) {
-    real_coords[0] += barycentric_coord[i] * verts_coord[i][0];
-    real_coords[1] += barycentric_coord[i] * verts_coord[i][1];
+    real_coords[0] += xi[i] * verts_coord[i][0];
+    real_coords[1] += xi[i] * verts_coord[i][1];
   }
   return real_coords;
 }
@@ -250,7 +253,7 @@ OMEGA_H_INLINE void ForEachIntersectionSubtriangle(
 // source_order + target_order), which are only known at construction.
 struct IntegrationData
 {
-  Kokkos::View<MeshField::Vector3*> bary_coords; // barycentric coordinates
+  Kokkos::View<MeshField::Vector2*> bary_coords; // barycentric coordinates
   Kokkos::View<Omega_h::Real*> weights;          // quadrature weights
 
   explicit IntegrationData(int order)
@@ -258,7 +261,7 @@ struct IntegrationData
     auto ip_vec = MeshField::getIntegrationPoints<MeshField::Triangle>(order);
     const std::size_t num_ip = ip_vec.size();
 
-    bary_coords = Kokkos::View<MeshField::Vector3*>("bary_coords", num_ip);
+    bary_coords = Kokkos::View<MeshField::Vector2*>("bary_coords", num_ip);
     weights = Kokkos::View<Omega_h::Real*>("weights", num_ip);
 
     auto bary_coords_host = Kokkos::create_mirror_view(bary_coords);
diff --git a/src/pcms/transfer/omega_h_mass_integrator.cpp b/src/pcms/transfer/omega_h_mass_integrator.cpp
index 29cd90e2..7666a55c 100644
--- a/src/pcms/transfer/omega_h_mass_integrator.cpp
+++ b/src/pcms/transfer/omega_h_mass_integrator.cpp
@@ -123,7 +123,7 @@ OmegaHMassIntegrator::OmegaHMassIntegrator(
     omf(mesh);
   auto coordField = omf.getCoordField();
   const auto [shp, map] = MeshField::Omegah::getTriangleElement<1>(mesh);
-  MeshField::FieldElement coordFe(mesh.nelems(), coordField, shp, map);
+  MeshField::FieldElement coordFe(mesh.nelems(), coordField.field, shp, map);
   auto elm_mass_dev = buildElementMassMatrix(mesh, coordFe);
 
   // Build COO sparsity pattern on device: each element contributes a 3x3 block.
diff --git a/test/test_omega_h_mass_integrator.cpp b/test/test_omega_h_mass_integrator.cpp
index 939283d1..a1de7e76 100644
--- a/test/test_omega_h_mass_integrator.cpp
+++ b/test/test_omega_h_mass_integrator.cpp
@@ -10,6 +10,7 @@
 #include <pcms/transfer/omega_h_mass_integrator.hpp>
 #include <KokkosController.hpp>
 #include <MeshField.hpp>
+#include <MeshField_Config.hpp>
 #include <MeshField_Element.hpp>
 #include <petscksp.h>
 #include <map>
@@ -60,7 +61,11 @@ std::map<std::pair<pcms::GO, pcms::GO>, pcms::Real> BuildReferenceMassMap(
     omf(mesh);
   auto coordField = omf.getCoordField();
   const auto [shp, map] = MeshField::Omegah::getTriangleElement<1>(mesh);
+#if MeshFields_VERSION < 10000
   MeshField::FieldElement coordFe(mesh.nelems(), coordField, shp, map);
+#else
+  MeshField::FieldElement coordFe(mesh.nelems(), coordField.field, shp, map);
+#endif
   auto elm_mass_dev = buildElementMassMatrix(mesh, coordFe);
   auto elm_mass_host =
     Kokkos::create_mirror_view_and_copy(Kokkos::HostSpace{}, elm_mass_dev);