From 3e09eb8aef1528322b0fdcdb2d003a23ff9ec15e Mon Sep 17 00:00:00 2001
From: Tobias Reiter <t.reiter1@live.de>
Date: Mon, 20 Apr 2026 15:24:13 +0200
Subject: [PATCH 01/10] perf: small fixes in lsToHullMesh

---
 include/viennals/lsToHullMesh.hpp | 49 +++++++++++++++++++------------
 1 file changed, 30 insertions(+), 19 deletions(-)

diff --git a/include/viennals/lsToHullMesh.hpp b/include/viennals/lsToHullMesh.hpp
index 9cba1a66..cc9e5edb 100644
--- a/include/viennals/lsToHullMesh.hpp
+++ b/include/viennals/lsToHullMesh.hpp
@@ -27,6 +27,7 @@ template <class T, int D> class ToHullMesh {
   SmartPointer<MaterialMap> materialMap = nullptr;
   bool generateSharpCorners = false;
   T bottomExtension = 0.0;
+  double minNodeDistanceFactor = 0.05;
 
   /// Generate hull mesh using ToMultiSurfaceMesh and boundary caps.
   /// generateSharpCorners is forwarded to the converter. Works for both
@@ -71,7 +72,7 @@ template <class T, int D> class ToHullMesh {
     }
 
     // Generate multi-surface mesh with sharp corners
-    ToMultiSurfaceMesh<T, D> converter;
+    ToMultiSurfaceMesh<T, D> converter(minNodeDistanceFactor, 1e-12);
     for (auto &ls : levelSets)
       converter.insertNextLevelSet(ls);
     if (materialMap)
@@ -89,7 +90,7 @@ template <class T, int D> class ToHullMesh {
                              double rangeMin, double rangeMax) {
         int varyingAxis = 1 - boundaryAxis;
         std::vector<std::pair<double, unsigned>> boundaryNodes;
-        double tolerance = 1e-6 * gridDelta;
+        const double tolerance = 1e-6 * gridDelta;
 
         for (unsigned i = 0; i < multiMesh->nodes.size(); ++i) {
           if (std::abs(multiMesh->nodes[i][boundaryAxis] - fixedValue) <
@@ -204,7 +205,7 @@ template <class T, int D> class ToHullMesh {
       using EdgeKey = std::tuple<int, int, int, int>;
       std::map<EdgeKey, unsigned> edgeToNode;
       std::map<std::tuple<int, int, int>, unsigned> existingGridNodes;
-      double invGridDelta = 1.0 / gridDelta;
+      const double invGridDelta = 1.0 / gridDelta;
 
       for (unsigned i = 0; i < multiMesh->nodes.size(); ++i) {
         const auto &pos = multiMesh->nodes[i];
@@ -258,22 +259,23 @@ template <class T, int D> class ToHullMesh {
 
       // Marching Squares Cases (Triangles)
       // 0-3: Corners (BL, BR, TR, TL), 4-7: Edges (B, R, T, L)
-      const std::vector<std::vector<int>> msTris = {{},
-                                                    {0, 4, 7},
-                                                    {1, 5, 4},
-                                                    {0, 1, 5, 0, 5, 7},
-                                                    {2, 6, 5},
-                                                    {0, 4, 7, 2, 6, 5},
-                                                    {1, 2, 6, 1, 6, 4},
-                                                    {0, 1, 2, 0, 2, 6, 0, 6, 7},
-                                                    {3, 7, 6},
-                                                    {0, 4, 6, 0, 6, 3},
-                                                    {1, 5, 4, 3, 7, 6},
-                                                    {0, 1, 5, 0, 5, 6, 0, 6, 3},
-                                                    {3, 2, 5, 3, 5, 7},
-                                                    {0, 4, 5, 0, 5, 2, 0, 2, 3},
-                                                    {1, 2, 3, 1, 3, 7, 1, 7, 4},
-                                                    {0, 1, 2, 0, 2, 3}};
+      constexpr std::array<std::vector<int>, 16> msTris = {
+          {},
+          {0, 4, 7},
+          {1, 5, 4},
+          {0, 1, 5, 0, 5, 7},
+          {2, 6, 5},
+          {0, 4, 7, 2, 6, 5},
+          {1, 2, 6, 1, 6, 4},
+          {0, 1, 2, 0, 2, 6, 0, 6, 7},
+          {3, 7, 6},
+          {0, 4, 6, 0, 6, 3},
+          {1, 5, 4, 3, 7, 6},
+          {0, 1, 5, 0, 5, 6, 0, 6, 3},
+          {3, 2, 5, 3, 5, 7},
+          {0, 4, 5, 0, 5, 2, 0, 2, 3},
+          {1, 2, 3, 1, 3, 7, 1, 7, 4},
+          {0, 1, 2, 0, 2, 3}};
 
       for (int d = 0; d < D; ++d) {
         for (int side = 0; side < 2; ++side) {
@@ -447,6 +449,15 @@ template <class T, int D> class ToHullMesh {
     }
   }
 
+  void setMinNodeDistanceFactor(double factor) {
+    if (factor <= 0) {
+      VIENNACORE_LOG_WARNING("ToHullMesh: minNodeDistanceFactor must be "
+                             "positive. Ignoring value.");
+      return;
+    }
+    minNodeDistanceFactor = factor;
+  }
+
   void apply() { generateHull(); }
 };
 

From 4509079a5f4bd0f08b99e2cdab297ae4d6bed6d1 Mon Sep 17 00:00:00 2001
From: reiter <t.reiter1@live.de>
Date: Wed, 22 Apr 2026 14:12:50 +0200
Subject: [PATCH 02/10] fix: pin vcpkg to avoid rebuilds

---
 .github/actions/setup/action.yml |  6 +++++-
 .github/workflows/build.yml      | 12 +++++++-----
 .github/workflows/python.yml     | 12 ++++++++----
 vcpkg.json                       |  8 ++++++++
 4 files changed, 28 insertions(+), 10 deletions(-)
 create mode 100644 vcpkg.json

diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index 798ff428..08cc91e8 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -55,5 +55,9 @@ runs:
       shell: bash
       if: ${{ inputs.os == 'windows-latest' }}
       run: |
+        unset VCPKG_ROOT
         git clone https://github.com/microsoft/vcpkg.git
-        ./vcpkg/bootstrap-vcpkg.bat
+        cd vcpkg
+        git checkout "$VCPKG_COMMIT"
+        ./bootstrap-vcpkg.bat
+        echo "VCPKG_ROOT=${GITHUB_WORKSPACE}/vcpkg" >> "$GITHUB_ENV"
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 678b4541..fc4450dc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -33,6 +33,7 @@ jobs:
     container: ${{ matrix.container }}
 
     env:
+      VCPKG_COMMIT: c3867e714dd3a51c272826eea77267876517ed99
       VCPKG_DEFAULT_BINARY_CACHE: ${{ github.workspace }}/.vcpkg-bincache
 
     name: "🧪 Test on ${{ matrix.os }} (⚙️: ${{ matrix.config }}, 💿: ${{ matrix.container || matrix.os }})"
@@ -56,22 +57,23 @@ jobs:
         run: |
           New-Item -ItemType Directory -Force -Path "${{ env.VCPKG_DEFAULT_BINARY_CACHE }}"
 
-      - name: 🦥 Cache VTK vcpkg build
+      - name: 🦥 Cache vcpkg binary (Windows)
         if: ${{ matrix.os == 'windows-latest' }}
         uses: actions/cache@v4
         with:
           path: ${{ env.VCPKG_DEFAULT_BINARY_CACHE }}
-          key: vcpkg-${{ matrix.os }}-${{ matrix.config }}
+          key: vcpkg-${{ matrix.os }}-${{ matrix.config }}-${{ env.VCPKG_COMMIT }}
 
-      - name: 🛠️ Build VTK (Windows)
+      - name: 🛠️ Build Dependencies (Windows)
         if: ${{ matrix.os == 'windows-latest' }}
+        shell: pwsh
         run: |
-          ./vcpkg/vcpkg install vtk
+          ./vcpkg/vcpkg install --triplet x64-windows
 
       - name: 🏗️ Compile (Windows)
         if: ${{ matrix.os == 'windows-latest' }}
         run: |
-          cmake -DVIENNALS_BUILD_TESTS=ON -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/vcpkg/scripts/buildsystems/vcpkg.cmake -B build
+          cmake -DVIENNALS_BUILD_TESTS=ON -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/vcpkg/scripts/buildsystems/vcpkg.cmake -DVCPKG_TARGET_TRIPLET=x64-windows -B build
           cmake --build build --config ${{ matrix.config }}
 
       - name: 🏗️ Compile (other)
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 51d86de3..18be297a 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -30,6 +30,7 @@ jobs:
     container: ${{ matrix.container }}
 
     env:
+      VCPKG_COMMIT: c3867e714dd3a51c272826eea77267876517ed99
       VCPKG_DEFAULT_BINARY_CACHE: ${{ github.workspace }}/.vcpkg-bincache
 
     name: "🐍 Test Bindings on ${{ matrix.os }}"
@@ -53,17 +54,18 @@ jobs:
         run: |
           New-Item -ItemType Directory -Force -Path "${{ env.VCPKG_DEFAULT_BINARY_CACHE }}"
 
-      - name: 🦥 Cache VTK vcpkg build
+      - name: 🦥 Cache vcpkg binary
         if: ${{ matrix.os == 'windows-latest' }}
         uses: actions/cache@v4
         with:
           path: ${{ env.VCPKG_DEFAULT_BINARY_CACHE }}
-          key: vcpkg-${{ matrix.os }}-Release
+          key: vcpkg-${{ matrix.os }}-Release-${{ env.VCPKG_COMMIT }}
 
       - name: 🛠️ Build VTK (Windows)
         if: ${{ matrix.os == 'windows-latest' }}
+        shell: pwsh
         run: |
-          ./vcpkg/vcpkg install vtk
+          ./vcpkg/vcpkg install --triplet x64-windows
 
       - name: 🛠️ Disable IPO
         if: ${{ matrix.os == 'ubuntu-latest' }}
@@ -79,7 +81,9 @@ jobs:
           $toolchain = "${{ github.workspace }}/vcpkg/scripts/buildsystems/vcpkg.cmake".Replace('\', '/')
 
           .\venv\Scripts\python -m pip install --upgrade pip
-          .\venv\Scripts\python -m pip install . --config-settings=cmake.args="-DCMAKE_TOOLCHAIN_FILE=$toolchain"
+          .\venv\Scripts\python -m pip install . `
+            --config-settings=cmake.define.CMAKE_TOOLCHAIN_FILE="$toolchain" `
+            --config-settings=cmake.define.VCPKG_TARGET_TRIPLET="x64-windows"
           .\venv\Scripts\python -c "import viennals; print(viennals.__doc__)"
 
       - name: 🐍 Build and check Python Module (Other)
diff --git a/vcpkg.json b/vcpkg.json
new file mode 100644
index 00000000..e0408443
--- /dev/null
+++ b/vcpkg.json
@@ -0,0 +1,8 @@
+{
+  "name": "viennals-ci",
+  "version-string": "1.0.0",
+  "dependencies": [
+    "vtk"
+  ],
+  "builtin-baseline": "c3867e714dd3a51c272826eea77267876517ed99"
+}
\ No newline at end of file

From 2ba3623df2a88bcaf1463fc509da034bc827c6ac Mon Sep 17 00:00:00 2001
From: reiter <t.reiter1@live.de>
Date: Wed, 22 Apr 2026 14:14:48 +0200
Subject: [PATCH 03/10] chore: bump version

---
 CMakeLists.txt                 | 2 +-
 README.md                      | 2 +-
 include/viennals/lsVersion.hpp | 4 ++--
 pyproject.toml                 | 2 +-
 python/viennals/__init__.pyi   | 4 ++--
 python/viennals/_core.pyi      | 4 ++--
 6 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8450552b..01f92758 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.20 FATAL_ERROR)
 project(
   ViennaLS
   LANGUAGES CXX
-  VERSION 5.7.1)
+  VERSION 5.7.2)
 
 # --------------------------------------------------------------------------------------------------------
 # Library options
diff --git a/README.md b/README.md
index c4d257e6..efcadc81 100644
--- a/README.md
+++ b/README.md
@@ -154,7 +154,7 @@ We recommend using [CPM.cmake](https://github.com/cpm-cmake/CPM.cmake) to consum
 
 * Installation with CPM
   ```cmake
-  CPMAddPackage("gh:viennatools/viennals@5.6.0")
+  CPMAddPackage("gh:viennatools/viennals@5.7.2")
   ```
 
 * With a local installation
diff --git a/include/viennals/lsVersion.hpp b/include/viennals/lsVersion.hpp
index 0498f9e7..b9b33c07 100644
--- a/include/viennals/lsVersion.hpp
+++ b/include/viennals/lsVersion.hpp
@@ -5,10 +5,10 @@
 namespace viennals {
 
 // Version information generated by CMake
-inline constexpr const char *version = "5.7.1";
+inline constexpr const char *version = "5.7.2";
 inline constexpr int versionMajor = 5;
 inline constexpr int versionMinor = 7;
-inline constexpr int versionPatch = 1;
+inline constexpr int versionPatch = 2;
 
 // Utility functions for version comparison
 inline constexpr uint32_t versionAsInteger() {
diff --git a/pyproject.toml b/pyproject.toml
index b4c1ccbe..33cde00a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ requires = [
 build-backend = "scikit_build_core.build"
 
 [project]
-version = "5.7.1"
+version = "5.7.2"
 name = "ViennaLS"
 readme = "README.md"
 license = {file = "LICENSE"}
diff --git a/python/viennals/__init__.pyi b/python/viennals/__init__.pyi
index b174a842..889e4d0d 100644
--- a/python/viennals/__init__.pyi
+++ b/python/viennals/__init__.pyi
@@ -112,6 +112,6 @@ def setDimension(d: int):
         
     """
 PROXY_DIM: int = 2
-__version__: str = '5.7.1'
-version: str = '5.7.1'
+__version__: str = '5.7.2'
+version: str = '5.7.2'
 _C = _core
diff --git a/python/viennals/_core.pyi b/python/viennals/_core.pyi
index f936fe5b..d88fb643 100644
--- a/python/viennals/_core.pyi
+++ b/python/viennals/_core.pyi
@@ -549,6 +549,6 @@ class VoidTopSurfaceEnum(enum.IntEnum):
         """
 def setNumThreads(arg0: typing.SupportsInt | typing.SupportsIndex) -> None:
     ...
-__version__: str = '5.7.1'
-version: str = '5.7.1'
+__version__: str = '5.7.2'
+version: str = '5.7.2'
 IntegrationSchemeEnum = SpatialSchemeEnum

From c73b51024fdbe5b60fb35b3c438d4c398bf3cf0b Mon Sep 17 00:00:00 2001
From: Tobias Reiter <t.reiter1@live.de>
Date: Wed, 22 Apr 2026 15:08:14 +0200
Subject: [PATCH 04/10] fix: constexpr var

---
 include/viennals/lsToHullMesh.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/viennals/lsToHullMesh.hpp b/include/viennals/lsToHullMesh.hpp
index cc9e5edb..12f3c7b6 100644
--- a/include/viennals/lsToHullMesh.hpp
+++ b/include/viennals/lsToHullMesh.hpp
@@ -259,7 +259,7 @@ template <class T, int D> class ToHullMesh {
 
       // Marching Squares Cases (Triangles)
       // 0-3: Corners (BL, BR, TR, TL), 4-7: Edges (B, R, T, L)
-      constexpr std::array<std::vector<int>, 16> msTris = {
+      constexpr std::vector<std::vector<int>> msTris = {
           {},
           {0, 4, 7},
           {1, 5, 4},

From eece46a662853813807b7555b5484238f971c5d5 Mon Sep 17 00:00:00 2001
From: Tobias Reiter <t.reiter1@live.de>
Date: Wed, 22 Apr 2026 15:38:30 +0200
Subject: [PATCH 05/10] fix: remove constexpr

---
 include/viennals/lsToHullMesh.hpp | 33 +++++++++++++++----------------
 1 file changed, 16 insertions(+), 17 deletions(-)

diff --git a/include/viennals/lsToHullMesh.hpp b/include/viennals/lsToHullMesh.hpp
index 12f3c7b6..8252a826 100644
--- a/include/viennals/lsToHullMesh.hpp
+++ b/include/viennals/lsToHullMesh.hpp
@@ -259,23 +259,22 @@ template <class T, int D> class ToHullMesh {
 
       // Marching Squares Cases (Triangles)
       // 0-3: Corners (BL, BR, TR, TL), 4-7: Edges (B, R, T, L)
-      constexpr std::vector<std::vector<int>> msTris = {
-          {},
-          {0, 4, 7},
-          {1, 5, 4},
-          {0, 1, 5, 0, 5, 7},
-          {2, 6, 5},
-          {0, 4, 7, 2, 6, 5},
-          {1, 2, 6, 1, 6, 4},
-          {0, 1, 2, 0, 2, 6, 0, 6, 7},
-          {3, 7, 6},
-          {0, 4, 6, 0, 6, 3},
-          {1, 5, 4, 3, 7, 6},
-          {0, 1, 5, 0, 5, 6, 0, 6, 3},
-          {3, 2, 5, 3, 5, 7},
-          {0, 4, 5, 0, 5, 2, 0, 2, 3},
-          {1, 2, 3, 1, 3, 7, 1, 7, 4},
-          {0, 1, 2, 0, 2, 3}};
+      const std::vector<std::vector<int>> msTris = {{},
+                                                    {0, 4, 7},
+                                                    {1, 5, 4},
+                                                    {0, 1, 5, 0, 5, 7},
+                                                    {2, 6, 5},
+                                                    {0, 4, 7, 2, 6, 5},
+                                                    {1, 2, 6, 1, 6, 4},
+                                                    {0, 1, 2, 0, 2, 6, 0, 6, 7},
+                                                    {3, 7, 6},
+                                                    {0, 4, 6, 0, 6, 3},
+                                                    {1, 5, 4, 3, 7, 6},
+                                                    {0, 1, 5, 0, 5, 6, 0, 6, 3},
+                                                    {3, 2, 5, 3, 5, 7},
+                                                    {0, 4, 5, 0, 5, 2, 0, 2, 3},
+                                                    {1, 2, 3, 1, 3, 7, 1, 7, 4},
+                                                    {0, 1, 2, 0, 2, 3}};
 
       for (int d = 0; d < D; ++d) {
         for (int side = 0; side < 2; ++side) {

From f78f4be1ced571e4999669a5dcab5d37dda9e9d6 Mon Sep 17 00:00:00 2001
From: reiter <t.reiter1@live.de>
Date: Thu, 23 Apr 2026 12:49:18 +0200
Subject: [PATCH 06/10] fix: github CI

---
 .github/actions/setup/action.yml | 10 ----------
 .github/workflows/build.yml      | 12 ++++++++++--
 .github/workflows/python.yml     | 20 ++++++++++++++------
 3 files changed, 24 insertions(+), 18 deletions(-)

diff --git a/.github/actions/setup/action.yml b/.github/actions/setup/action.yml
index 08cc91e8..eabde0a8 100644
--- a/.github/actions/setup/action.yml
+++ b/.github/actions/setup/action.yml
@@ -51,13 +51,3 @@ runs:
       run: |
         echo "MACOSX_DEPLOYMENT_TARGET=15.0" >> $GITHUB_ENV
 
-    - name: Setup vcpkg (Windows)
-      shell: bash
-      if: ${{ inputs.os == 'windows-latest' }}
-      run: |
-        unset VCPKG_ROOT
-        git clone https://github.com/microsoft/vcpkg.git
-        cd vcpkg
-        git checkout "$VCPKG_COMMIT"
-        ./bootstrap-vcpkg.bat
-        echo "VCPKG_ROOT=${GITHUB_WORKSPACE}/vcpkg" >> "$GITHUB_ENV"
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fc4450dc..390a27f2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -51,10 +51,18 @@ jobs:
         if: ${{ matrix.os == 'macos-latest' }}
         run: brew install vtk
 
-      - name: Create vcpkg binary cache dir
-        if: ${{ matrix.os == 'windows-latest' }}
+      - name: 🖥️ Setup vcpkg (Windows)
         shell: pwsh
+        if: ${{ matrix.os == 'windows-latest' }}
         run: |
+          Remove-Item Env:VCPKG_ROOT -ErrorAction SilentlyContinue
+
+          git clone https://github.com/microsoft/vcpkg.git
+          git -C vcpkg checkout $env:VCPKG_COMMIT
+          & .\vcpkg\bootstrap-vcpkg.bat
+
+          "VCPKG_ROOT=$($env:GITHUB_WORKSPACE)\vcpkg" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
           New-Item -ItemType Directory -Force -Path "${{ env.VCPKG_DEFAULT_BINARY_CACHE }}"
 
       - name: 🦥 Cache vcpkg binary (Windows)
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 18be297a..da204efb 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -44,16 +44,24 @@ jobs:
         with:
           os: ${{ matrix.os }}
 
-      - name: 📋 Install MacOS Dependencies
-        if: ${{ matrix.os == 'macos-latest' }}
-        run: brew install vtk
-
-      - name: Create vcpkg binary cache dir
-        if: ${{ matrix.os == 'windows-latest' }}
+      - name: 🖥️ Setup vcpkg (Windows)
         shell: pwsh
+        if: ${{ matrix.os == 'windows-latest' }}
         run: |
+          Remove-Item Env:VCPKG_ROOT -ErrorAction SilentlyContinue
+
+          git clone https://github.com/microsoft/vcpkg.git
+          git -C vcpkg checkout $env:VCPKG_COMMIT
+          & .\vcpkg\bootstrap-vcpkg.bat
+
+          "VCPKG_ROOT=$($env:GITHUB_WORKSPACE)\vcpkg" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+
           New-Item -ItemType Directory -Force -Path "${{ env.VCPKG_DEFAULT_BINARY_CACHE }}"
 
+      - name: 📋 Install MacOS Dependencies
+        if: ${{ matrix.os == 'macos-latest' }}
+        run: brew install vtk
+
       - name: 🦥 Cache vcpkg binary
         if: ${{ matrix.os == 'windows-latest' }}
         uses: actions/cache@v4

From 3b5d7cad6357d6e78f44da2bf081b1885475407c Mon Sep 17 00:00:00 2001
From: Tobias Reiter <t.reiter1@live.de>
Date: Fri, 24 Apr 2026 10:05:13 +0200
Subject: [PATCH 07/10] fix: change vtk default target to VTK::CommonCore

---
 CMakeLists.txt     | 1 +
 python/__init__.py | 7 +++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 01f92758..4f9564b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -112,6 +112,7 @@ include(cmake/vtk.cmake)
 CPMAddPackage(
   NAME ViennaCore
   VERSION 2.1.1
+  GIT_TAG main
   GIT_REPOSITORY "https://github.com/ViennaTools/ViennaCore"
   OPTIONS "VIENNACORE_FORMAT_EXCLUDE build/"
   EXCLUDE_FROM_ALL ${VIENNALS_BUILD_PYTHON})
diff --git a/python/__init__.py b/python/__init__.py
index 12459eb8..413f2312 100644
--- a/python/__init__.py
+++ b/python/__init__.py
@@ -18,8 +18,9 @@ def _windows_dll_path():
     ]
 
     for path in additional_paths:
-        os.add_dll_directory(path)
-        os.environ["PATH"] = path + os.pathsep + os.environ["PATH"]
+        if os.path.isdir(path):
+            os.add_dll_directory(path)
+            os.environ["PATH"] = path + os.pathsep + os.environ["PATH"]
 
 
 import sys as _sys
@@ -51,6 +52,7 @@ def setDimension(d: int):
     else:
         raise ValueError("Dimension must be 2 or 3.")
 
+
 def getDimension() -> int:
     """Get the current dimension of the simulation.
 
@@ -61,6 +63,7 @@ def getDimension() -> int:
     """
     return PROXY_DIM
 
+
 def __getattr__(name):
     # 1) common/top-level from _core
     try:

From 2f42684c6926c8c094e8ea9697cc1213af83cb17 Mon Sep 17 00:00:00 2001
From: Tobias Reiter <t.reiter1@live.de>
Date: Fri, 24 Apr 2026 10:16:26 +0200
Subject: [PATCH 08/10] add DLL path warning

---
 CMakeLists.txt     | 3 +--
 python/__init__.py | 2 ++
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4f9564b7..19f3c2a8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -111,8 +111,7 @@ include(cmake/vtk.cmake)
 
 CPMAddPackage(
   NAME ViennaCore
-  VERSION 2.1.1
-  GIT_TAG main
+  VERSION 2.1.2
   GIT_REPOSITORY "https://github.com/ViennaTools/ViennaCore"
   OPTIONS "VIENNACORE_FORMAT_EXCLUDE build/"
   EXCLUDE_FROM_ALL ${VIENNALS_BUILD_PYTHON})
diff --git a/python/__init__.py b/python/__init__.py
index 413f2312..351206d4 100644
--- a/python/__init__.py
+++ b/python/__init__.py
@@ -21,6 +21,8 @@ def _windows_dll_path():
         if os.path.isdir(path):
             os.add_dll_directory(path)
             os.environ["PATH"] = path + os.pathsep + os.environ["PATH"]
+        else:
+            print(f"Warning: DLL path {path} does not exist.")
 
 
 import sys as _sys

From 78dbee07ed662c63390acf165c87d9aaaef406e5 Mon Sep 17 00:00:00 2001
From: Tobias Reiter <t.reiter1@live.de>
Date: Fri, 24 Apr 2026 10:56:39 +0200
Subject: [PATCH 09/10] fix: copy libs only during package or on Windows

---
 python/CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index dd14b5d0..cd888510 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -77,7 +77,10 @@ add_dependencies(${PROJECT_NAME} ${MOD})
 
 set(VIENNALS_LIB_FOLDER ${CMAKE_BINARY_DIR}/${PKG}.libs)
 
-viennacore_setup_vtk_env(${MOD} ${VIENNALS_LIB_FOLDER})
+if(VIENNAPS_PACKAGE_PYTHON OR MSVC)
+  # Copy the required libraries to the lib folder, this is required for packaging and on Windows
+  viennacore_setup_vtk_env(${MOD} ${VIENNALS_LIB_FOLDER})
+endif()
 
 install(
   DIRECTORY ${VIENNALS_LIB_FOLDER}

From e9a9b3971c1faaa95593465e3d16e98f9437f46c Mon Sep 17 00:00:00 2001
From: Tobias Reiter <t.reiter1@live.de>
Date: Fri, 24 Apr 2026 11:24:20 +0200
Subject: [PATCH 10/10] fix: typo

---
 python/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index cd888510..192d3e8d 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -77,7 +77,7 @@ add_dependencies(${PROJECT_NAME} ${MOD})
 
 set(VIENNALS_LIB_FOLDER ${CMAKE_BINARY_DIR}/${PKG}.libs)
 
-if(VIENNAPS_PACKAGE_PYTHON OR MSVC)
+if(VIENNALS_PACKAGE_PYTHON OR MSVC)
   # Copy the required libraries to the lib folder, this is required for packaging and on Windows
   viennacore_setup_vtk_env(${MOD} ${VIENNALS_LIB_FOLDER})
 endif()