diff --git a/.github/workflows/hipo-macos.yml b/.github/workflows/hipo-macos.yml
deleted file mode 100644
index f3efcc4c1d..0000000000
--- a/.github/workflows/hipo-macos.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-name: hipo-macos
-
-on: [push, pull_request]
-
-jobs:
-  macos:
-    runs-on: macos-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        config: [Release, Debug]
-        all_tests: [ON, OFF]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
-      - name: Configure CMake
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake $GITHUB_WORKSPACE -DHIPO=ON \
-          -DCMAKE_BUILD_TYPE=${{ matrix.config }} \
-          -DALL_TESTS=${{ matrix.all_tests }}
-
-      - name: Build
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake --build . --parallel
-
-      - name: Test executable
-        working-directory: ${{runner.workspace}}/build
-        run: ./bin/highs --solver=hipo $GITHUB_WORKSPACE/check/instances/afiro.mps
-
-      - name: Ctest
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          ctest --parallel --timeout 300 --output-on-failure
diff --git a/.github/workflows/hipo-ubuntu-cblas.yml b/.github/workflows/hipo-ubuntu-cblas.yml
deleted file mode 100644
index a8160bd974..0000000000
--- a/.github/workflows/hipo-ubuntu-cblas.yml
+++ /dev/null
@@ -1,107 +0,0 @@
-name: hipo-ubuntu-cblas
-
-on: [push, pull_request]
-
-jobs:
-  ubuntu_gh:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        # config: [Release, Debug]
-        config: [Release]
-        all_tests: [OFF]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Checkout GKlib
-        uses: actions/checkout@v4
-        with:
-          repository: KarypisLab/GKlib
-          ref: master
-          path: GKlib
-
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: KarypisLab/METIS
-          ref: master
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install GKlib
-        run: |
-          cd GKlib
-          make config shared=1 prefix=${{runner.workspace}}/installs
-          make
-          make install
-
-      # - name: Check installs
-      #   working-directory: ${{runner.workspace}}
-      #   run: |
-      #     cd installs
-      #     ls
-      #     ls lib
-
-      - name: Copy GKlib shared (bug)
-        working-directory: ${{runner.workspace}}
-        run: |
-          cd installs
-          cd lib
-          ln libGKlib.so.0 libGKlib.so
-          ls
-
-      - name: Install METIS
-        run: |
-          cd METIS
-          make config shared=1 prefix=${{runner.workspace}}/installs
-          make
-          make install
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libblas
-
-      - name: Install BLAS
-        shell: bash
-        run: |
-          sudo apt update
-          sudo apt install libblas-dev
-
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
-      - name: Configure CMake
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake $GITHUB_WORKSPACE -DHIPO=ON \
-          -DCMAKE_BUILD_TYPE=${{ matrix.config }} \
-          -DALL_TESTS=${{ matrix.all_tests }} \
-          -DMETIS_ROOT=${{runner.workspace}}/installs \
-          -DGKLIB_ROOT=${{runner.workspace}}/installs
-
-      - name: Build
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake --build . --parallel
-
-      - name: Test executable
-        working-directory: ${{runner.workspace}}/build
-        run: ./bin/highs --solver=hipo $GITHUB_WORKSPACE/check/instances/afiro.mps
-
-      - name: Ctest
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          ctest --parallel --timeout 300 --output-on-failure
diff --git a/.github/workflows/hipo-win.yml b/.github/workflows/hipo-win.yml
deleted file mode 100644
index a6e3672262..0000000000
--- a/.github/workflows/hipo-win.yml
+++ /dev/null
@@ -1,208 +0,0 @@
-name: hipo-win
-
-on: [push, pull_request]
-
-jobs:
-  win-vcpkg:
-    runs-on: windows-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        config: [Release, Debug]
-        all_tests: [OFF]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Checkout metis overlay ports
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/metis-overlay-ports
-          ref: main
-          path: overlay-ports
-
-      - name: List overlay contents
-        shell: pwsh
-        run: Get-ChildItem -Recurse "$env:GITHUB_WORKSPACE/overlay-ports"
-
-      - name: Install metis with overlay port
-        shell: pwsh
-        run: |
-          vcpkg install metis gklib `
-          --overlay-ports="$env:GITHUB_WORKSPACE/overlay-ports/ports/metis" `
-          --overlay-ports="$env:GITHUB_WORKSPACE/overlay-ports/ports/gklib"
-
-      - name: Install OpenBLAS
-        shell: pwsh
-        run: vcpkg install openblas[threads]
-
-      - name: Configure CMake
-        shell: pwsh
-        run: |
-          cmake `
-          -S "$env:GITHUB_WORKSPACE" `
-          -B "${{ runner.workspace }}/build" `
-          -DHIPO=ON `
-          -DCMAKE_TOOLCHAIN_FILE="C:/vcpkg/scripts/buildsystems/vcpkg.cmake" `
-          -DALL_TESTS=${{ matrix.all_tests }}
-
-      - name: Build
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake --build . --parallel --config ${{ matrix.config }}
-
-      - name: Test executable
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          & ".\${{ matrix.config }}\bin\highs.exe" --solver=hipo `
-          "$env:GITHUB_WORKSPACE/check/instances/afiro.mps"
-
-      - name: Ctest
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          ctest --parallel --timeout 300 --output-on-failure -C ${{ matrix.config }}
-
-  win-510-ts:
-    runs-on: windows-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        config: [Release, Debug]
-        all_tests: [ON, OFF]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 510-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          ls
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        shell: pwsh
-        run: |
-          cd METIS
-          pwd
-          cmake -S. -B build `
-          -DGKLIB_PATH="$env:GITHUB_WORKSPACE/METIS/GKlib" `
-          -DCMAKE_INSTALL_PREFIX="${{ runner.workspace }}/installs" `
-          -DCMAKE_BUILD_TYPE=${{ matrix.config }}
-          cmake --build build --parallel --config ${{ matrix.config }}
-          cmake --install build --config ${{ matrix.config }}
-
-      - name: Install OpenBLAS
-        shell: pwsh
-        run: vcpkg install openblas[threads]
-
-      - name: Configure CMake
-        shell: pwsh
-        run: |
-          cmake `
-          -S "$env:GITHUB_WORKSPACE" `
-          -B "${{ runner.workspace }}/build" `
-          -DHIPO=ON `
-          -DCMAKE_TOOLCHAIN_FILE="C:/vcpkg/scripts/buildsystems/vcpkg.cmake" `
-          -DMETIS_ROOT="${{ runner.workspace }}/installs" `
-          -DALL_TESTS=${{ matrix.all_tests }}
-
-      - name: Build
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake --build . --parallel --config ${{ matrix.config }}
-
-      - name: Test executable
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          & ".\${{ matrix.config }}\bin\highs.exe" --solver=hipo `
-          "$env:GITHUB_WORKSPACE/check/instances/afiro.mps"
-
-      - name: Ctest
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          ctest --parallel --timeout 300 --output-on-failure -C ${{ matrix.config }}
-
-  win-521-ts:
-    runs-on: windows-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        config: [Release, Debug]
-        all_tests: [ON, OFF]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          ls
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        shell: pwsh
-        run: |
-          cd METIS
-          pwd
-          cmake -S. -B build `
-          -DGKLIB_PATH="$env:GITHUB_WORKSPACE/METIS/GKlib" `
-          -DCMAKE_INSTALL_PREFIX="${{ runner.workspace }}/installs" `
-          -DCMAKE_BUILD_TYPE=${{ matrix.config }}
-          cmake --build build --parallel --config ${{ matrix.config }}
-          cmake --install build --config ${{ matrix.config }}
-
-      - name: Install OpenBLAS
-        shell: pwsh
-        run: vcpkg install openblas[threads]
-
-      - name: Configure CMake
-        shell: pwsh
-        run: |
-          cmake `
-          -S "$env:GITHUB_WORKSPACE" `
-          -B "${{ runner.workspace }}/build" `
-          -DHIPO=ON `
-          -DCMAKE_TOOLCHAIN_FILE="C:/vcpkg/scripts/buildsystems/vcpkg.cmake" `
-          -DMETIS_ROOT="${{ runner.workspace }}/installs" `
-          -DALL_TESTS=${{ matrix.all_tests }}
-
-      - name: Build
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake --build . --parallel --config ${{ matrix.config }}
-
-      - name: Test executable
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          & ".\${{ matrix.config }}\bin\highs.exe" --solver=hipo `
-          "$env:GITHUB_WORKSPACE/check/instances/afiro.mps"
-
-      - name: Ctest
-        shell: pwsh
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          ctest --parallel --timeout 300 --output-on-failure -C ${{ matrix.config }}
diff --git a/.github/workflows/hipo-ubuntu.yml b/.github/workflows/hipo.yml
similarity index 53%
rename from .github/workflows/hipo-ubuntu.yml
rename to .github/workflows/hipo.yml
index 84aab111d8..84727731ec 100644
--- a/.github/workflows/hipo-ubuntu.yml
+++ b/.github/workflows/hipo.yml
@@ -1,8 +1,105 @@
-name: hipo-ubuntu
+name: hipo
 
 on: [push, pull_request]
 
 jobs:
+  win-vcpkg:
+    runs-on: windows-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        config: [Release, Debug]
+        all_tests: [OFF]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Checkout metis overlay ports
+        uses: actions/checkout@v4
+        with:
+          repository: galabovaa/metis-overlay-ports
+          ref: main
+          path: overlay-ports
+
+      - name: List overlay contents
+        shell: pwsh
+        run: Get-ChildItem -Recurse "$env:GITHUB_WORKSPACE/overlay-ports"
+
+      - name: Install metis with overlay port
+        shell: pwsh
+        run: |
+          vcpkg install metis gklib `
+          --overlay-ports="$env:GITHUB_WORKSPACE/overlay-ports/ports/metis" `
+          --overlay-ports="$env:GITHUB_WORKSPACE/overlay-ports/ports/gklib"
+
+      - name: Install OpenBLAS
+        shell: pwsh
+        run: vcpkg install openblas[threads]
+
+      - name: Configure CMake
+        shell: pwsh
+        run: |
+          cmake `
+          -S "$env:GITHUB_WORKSPACE" `
+          -B "${{ runner.workspace }}/build" `
+          -DHIPO=ON `
+          -DCMAKE_TOOLCHAIN_FILE="C:/vcpkg/scripts/buildsystems/vcpkg.cmake" `
+          -DALL_TESTS=${{ matrix.all_tests }}
+
+      - name: Build
+        shell: pwsh
+        working-directory: ${{runner.workspace}}/build
+        run: |
+          cmake --build . --parallel --config ${{ matrix.config }}
+
+      - name: Test executable
+        shell: pwsh
+        working-directory: ${{runner.workspace}}/build
+        run: |
+          & ".\${{ matrix.config }}\bin\highs.exe" --solver=hipo `
+          "$env:GITHUB_WORKSPACE/check/instances/afiro.mps"
+
+      - name: Ctest
+        shell: pwsh
+        working-directory: ${{runner.workspace}}/build
+        run: |
+          ctest --parallel --timeout 300 --output-on-failure -C ${{ matrix.config }}
+
+  macos:
+    runs-on: macos-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        config: [Release, Debug]
+        all_tests: [ON, OFF]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Create Build Environment
+        run: cmake -E make_directory ${{runner.workspace}}/build
+
+      - name: Configure CMake
+        working-directory: ${{runner.workspace}}/build
+        run: |
+          cmake $GITHUB_WORKSPACE -DHIPO=ON \
+          -DCMAKE_BUILD_TYPE=${{ matrix.config }} \
+          -DALL_TESTS=${{ matrix.all_tests }}
+
+      - name: Build
+        working-directory: ${{runner.workspace}}/build
+        run: |
+          cmake --build . --parallel
+
+      - name: Test executable
+        working-directory: ${{runner.workspace}}/build
+        run: ./bin/highs --solver=hipo $GITHUB_WORKSPACE/check/instances/afiro.mps
+
+      - name: Ctest
+        working-directory: ${{runner.workspace}}/build
+        run: |
+          ctest --parallel --timeout 300 --output-on-failure
+
   ubuntu_gh:
     runs-on: ubuntu-latest
     strategy:
@@ -105,56 +202,23 @@ jobs:
         run: |
           ctest --parallel --timeout 300 --output-on-failure
 
-  ubuntu_510-ts:
+  ubuntu_cblas:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        config: [Release, Debug]
-        all_tests: [ON, OFF]
+        # config: [Release, Debug]
+        config: [Release]
+        all_tests: [OFF]
 
     steps:
       - uses: actions/checkout@v4
 
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 510-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs \
-          -DCMAKE_BUILD_TYPE=${{ matrix.config }}
-          cmake --build build --parallel
-          cmake --install build
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
-
-      - name: Install OpenBLAS
+      - name: Install BLAS
         shell: bash
         run: |
           sudo apt update
-          sudo apt install libopenblas-dev
+          sudo apt install libblas-dev
 
       - name: Create Build Environment
         run: cmake -E make_directory ${{runner.workspace}}/build
@@ -164,8 +228,7 @@ jobs:
         run: |
           cmake $GITHUB_WORKSPACE -DHIPO=ON \
           -DCMAKE_BUILD_TYPE=${{ matrix.config }} \
-          -DALL_TESTS=${{ matrix.all_tests }} \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
+          -DALL_TESTS=${{ matrix.all_tests }}
 
       - name: Build
         working-directory: ${{runner.workspace}}/build
@@ -181,78 +244,80 @@ jobs:
         run: |
           ctest --parallel --timeout 300 --output-on-failure
 
-  ubuntu_521-ts:
-    runs-on: ubuntu-latest
+  ubuntu_debug:
+    runs-on: ${{ matrix.os }}
+
     strategy:
       fail-fast: false
       matrix:
-        config: [Release, Debug]
-        all_tests: [ON, OFF]
+        os: [ubuntu-latest]
+        config: [Debug]
+        all_tests: [ON]
 
     steps:
       - uses: actions/checkout@v4
 
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
+      - name: Create Build Environment
+        run: cmake -E make_directory ${{runner.workspace}}/build
 
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
+      - name: Configure CMake
+        working-directory: ${{runner.workspace}}/build
         run: |
-          mkdir installs
-          ls
+          cmake $GITHUB_WORKSPACE -DHIPO=ON -DBUILD_OPENBLAS=ON \
+            -DALL_TESTS=${{ matrix.all_tests }}
 
-      - name: Install METIS
+      - name: Build
+        working-directory: ${{runner.workspace}}/build
         run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs \
-          -DCMAKE_BUILD_TYPE=${{ matrix.config }}
-          cmake --build build --parallel
-          cmake --install build
+          cmake --build . -j2
 
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
+      - name: Test executable
+        working-directory: ${{runner.workspace}}/build
+        run: ./bin/highs --solver=hipo $GITHUB_WORKSPACE/check/instances/afiro.mps
 
-      - name: Install OpenBLAS
-        shell: bash
+      - name: Ctest
+        working-directory: ${{runner.workspace}}/build
         run: |
-          sudo apt update
-          sudo apt install libopenblas-dev
+          ctest --parallel --timeout 300 --output-on-failure
 
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
+  windows_debug:
+    runs-on: [windows-latest]
+    strategy:
+      fail-fast: false
+      matrix:
+        config: [Debug]
+        all_tests: [ON]
+        arch: ["x64"]
+
+    steps:
+      - uses: actions/checkout@v4
 
       - name: Configure CMake
-        working-directory: ${{runner.workspace}}/build
+        shell: pwsh
         run: |
-          cmake $GITHUB_WORKSPACE -DHIPO=ON \
-          -DCMAKE_BUILD_TYPE=${{ matrix.config }} \
-          -DALL_TESTS=${{ matrix.all_tests }} \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
+          cmake `
+          -S "$env:GITHUB_WORKSPACE" `
+          -B "${{ runner.workspace }}/build" `
+          -A ${{ matrix.arch }} `
+          -DHIPO=ON `
+          -DALL_TESTS=${{ matrix.all_tests }} `
+          -DBUILD_OPENBLAS=ON
 
       - name: Build
+        shell: pwsh
         working-directory: ${{runner.workspace}}/build
         run: |
-          cmake --build . --parallel
+          cmake --build . --parallel --config ${{ matrix.config }}
 
       - name: Test executable
+        shell: pwsh
         working-directory: ${{runner.workspace}}/build
-        run: ./bin/highs --solver=hipo $GITHUB_WORKSPACE/check/instances/afiro.mps
+        run: |
+          & ".\${{ matrix.config }}\bin\highs.exe" --solver=hipo `
+          "$env:GITHUB_WORKSPACE/check/instances/afiro.mps"
 
       - name: Ctest
+        shell: pwsh
         working-directory: ${{runner.workspace}}/build
         run: |
-          ctest --parallel --timeout 300 --output-on-failure
+          ctest --parallel --timeout 300 --output-on-failure -C ${{ matrix.config }}
\ No newline at end of file
diff --git a/.github/workflows/release-cpack.yml b/.github/workflows/release-cpack.yml
index fbe1bbd273..12a679e8f8 100644
--- a/.github/workflows/release-cpack.yml
+++ b/.github/workflows/release-cpack.yml
@@ -261,7 +261,8 @@ jobs:
       - uses: actions/checkout@v3
       - name: Build
         run: |
-          cmake -B build -G "Visual Studio 17 2022" -A ${{ matrix.arch }}
+          cmake -B build -G "Visual Studio 17 2022" -A ${{ matrix.arch }} `
+            -DBUILD_SHARED_LIBS=ON
           cmake --build build --config Release --parallel
           cd build
           cpack -C Release
diff --git a/.github/workflows/valgrind-hipo-md.yml b/.github/workflows/valgrind-hipo-md.yml
deleted file mode 100644
index 469d87632e..0000000000
--- a/.github/workflows/valgrind-hipo-md.yml
+++ /dev/null
@@ -1,316 +0,0 @@
-name: valgrind-hipo-md
-
-on: [push, pull_request]
-
-jobs:
-  unit_tests:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-      
-      - name: Install Valgrind
-        run: sudo apt-get update && sudo apt-get install valgrind
-
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs
-          cmake --build build --parallel
-          cmake --install build
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
-
-      - name: Install OpenBLAS
-        shell: bash
-        run: |
-          sudo apt update
-          sudo apt install libopenblas-dev
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
-      - name: Configure CMake
-        shell: bash
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake $GITHUB_WORKSPACE -DHIPO=ON \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DALL_TESTS=ON \
-          -DBLA_VENDOR=OpenBLAS \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
-
-      - name: Build
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          cmake --build . -j2
-
-      - name: Test
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          valgrind \
-          --leak-check=full \
-          --show-leak-kinds=all \
-          --track-origins=yes \
-          -s \
-          ./bin/unit_tests \
-          2>&1 | tee logfile
-
-      - name: Check log for Errors
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          cat logfile
-          OUTPUT='ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)'
-          if grep -q "$OUTPUT" logfile; then
-            exit 0
-          fi
-          exit 1
-
-  instance_tests:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install Valgrind
-        run: sudo apt-get update && sudo apt-get install valgrind
-
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs
-          cmake --build build --parallel
-          cmake --install build
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
-
-      - name: Install OpenBLAS
-        shell: bash
-        run: |
-          sudo apt update
-          sudo apt install libopenblas-dev
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
-      - name: Configure CMake
-        shell: bash
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake $GITHUB_WORKSPACE -DHIPO=ON \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DALL_TESTS=ON \
-          -DBLA_VENDOR=OpenBLAS \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
-
-      - name: Build
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          cmake --build . -j2
-
-      - name: Test
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          valgrind \
-          --leak-check=full \
-          --show-leak-kinds=all \
-          --track-origins=yes \
-          -s \
-          ctest -E unit.* \
-          --timeout 1000 \
-          --output-on-failure \
-          2>&1 | tee logfile2
-
-      - name: Check log for Errors
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          cat logfile2
-          OUTPUT='ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)'
-          if grep -q "$OUTPUT" logfile2; then
-            exit 0
-          fi
-          exit 1
-
-  examples:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-latest]
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Install Valgrind
-        run: sudo apt-get update && sudo apt-get install valgrind
-      
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs
-          cmake --build build --parallel
-          cmake --install build
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
-
-      - name: Install OpenBLAS
-        shell: bash
-        run: |
-          sudo apt update
-          sudo apt install libopenblas-dev
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
-      - name: Configure CMake
-        shell: bash
-        working-directory: ${{runner.workspace}}/build
-        run: |
-          cmake $GITHUB_WORKSPACE -DHIPO=ON \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DALL_TESTS=ON \
-          -DBLA_VENDOR=OpenBLAS \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
-
-
-      - name: Build
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          cmake --build . -j2
-
-      - name: Test cpp example
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          valgrind \
-          --leak-check=full \
-          --show-leak-kinds=all \
-          --track-origins=yes \
-          -s \
-          ./bin/call_highs_from_cpp \
-          --timeout 1000 \
-          --output-on-failure \
-          2>&1 | tee logfile2
-
-      - name: Check log for Errors
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          cat logfile2
-          OUTPUT='ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)'
-          if grep -q "$OUTPUT" logfile2; then
-            exit 0
-          fi
-          exit 1
-      
-      - name: Test C example
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          valgrind \
-          --leak-check=full \
-          --show-leak-kinds=all \
-          --track-origins=yes \
-          -s \
-          ./bin/call_highs_from_c_minimal \
-          --timeout 1000 \
-          --output-on-failure \
-          2>&1 | tee logfile2
-
-      - name: Check log for Errors
-        working-directory: ${{runner.workspace}}/build
-        shell: bash
-        run: |
-          cat logfile2
-          OUTPUT='ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)'
-          if grep -q "$OUTPUT" logfile2; then
-            exit 0
-          fi
-          exit 1
\ No newline at end of file
diff --git a/.github/workflows/valgrind-hipo.yml b/.github/workflows/valgrind-hipo.yml
index 3770f9ff73..a32d30d81f 100644
--- a/.github/workflows/valgrind-hipo.yml
+++ b/.github/workflows/valgrind-hipo.yml
@@ -8,48 +8,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      
+
       - name: Install Valgrind
         run: sudo apt-get update && sudo apt-get install valgrind
 
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs
-          cmake --build build --parallel
-          cmake --install build
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
-
-      - name: Install OpenBLAS
-        shell: bash
-        run: |
-          sudo apt update
-          sudo apt install libopenblas-dev
       - name: Create Build Environment
         run: cmake -E make_directory ${{runner.workspace}}/build
 
@@ -58,10 +20,9 @@ jobs:
         working-directory: ${{runner.workspace}}/build
         run: |
           cmake $GITHUB_WORKSPACE -DHIPO=ON \
+          -DBUILD_OPENBLAS=ON \
           -DCMAKE_BUILD_TYPE=Debug \
-          -DALL_TESTS=ON \
-          -DBLA_VENDOR=OpenBLAS \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
+          -DALL_TESTS=ON
 
       - name: Build
         working-directory: ${{runner.workspace}}/build
@@ -104,47 +65,6 @@ jobs:
       - name: Install Valgrind
         run: sudo apt-get update && sudo apt-get install valgrind
 
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs
-          cmake --build build --parallel
-          cmake --install build
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
-
-      - name: Install OpenBLAS
-        shell: bash
-        run: |
-          sudo apt update
-          sudo apt install libopenblas-dev
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
-
       - name: Create Build Environment
         run: cmake -E make_directory ${{runner.workspace}}/build
 
@@ -153,10 +73,9 @@ jobs:
         working-directory: ${{runner.workspace}}/build
         run: |
           cmake $GITHUB_WORKSPACE -DHIPO=ON \
+          -DBUILD_OPENBLAS=ON \
           -DCMAKE_BUILD_TYPE=Debug \
-          -DALL_TESTS=ON \
-          -DBLA_VENDOR=OpenBLAS \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
+          -DALL_TESTS=ON
 
       - name: Build
         working-directory: ${{runner.workspace}}/build
@@ -200,47 +119,6 @@ jobs:
 
       - name: Install Valgrind
         run: sudo apt-get update && sudo apt-get install valgrind
-      
-      - name: Checkout METIS
-        uses: actions/checkout@v4
-        with:
-          repository: galabovaa/METIS
-          ref: 521-ts
-          path: METIS
-
-      - name: Create installs dir
-        working-directory: ${{runner.workspace}}
-        run: |
-          mkdir installs
-          ls
-
-      - name: Install METIS
-        run: |
-          cmake \
-          -S $GITHUB_WORKSPACE/METIS \
-          -B build \
-          -DGKLIB_PATH=${{ github.workspace }}/METIS/GKlib \
-          -DCMAKE_INSTALL_PREFIX=${{ runner.workspace }}/installs
-          cmake --build build --parallel
-          cmake --install build
-
-      # no default blas available on runner
-
-      - name: Cache APT packages
-        uses: actions/cache@v4
-        with:
-          path: |
-            /var/cache/apt/archives
-            /var/lib/apt/lists
-          key: ${{ runner.os }}-apt-libopenblas
-
-      - name: Install OpenBLAS
-        shell: bash
-        run: |
-          sudo apt update
-          sudo apt install libopenblas-dev
-      - name: Create Build Environment
-        run: cmake -E make_directory ${{runner.workspace}}/build
 
       - name: Create Build Environment
         run: cmake -E make_directory ${{runner.workspace}}/build
@@ -250,11 +128,8 @@ jobs:
         working-directory: ${{runner.workspace}}/build
         run: |
           cmake $GITHUB_WORKSPACE -DHIPO=ON \
-          -DCMAKE_BUILD_TYPE=Debug \
-          -DALL_TESTS=ON \
-          -DBLA_VENDOR=OpenBLAS \
-          -DMETIS_ROOT=${{runner.workspace}}/installs
-
+          -DBUILD_OPENBLAS=ON \
+          -DCMAKE_BUILD_TYPE=Debug
 
       - name: Build
         working-directory: ${{runner.workspace}}/build
@@ -286,7 +161,7 @@ jobs:
             exit 0
           fi
           exit 1
-      
+
       - name: Test C example
         working-directory: ${{runner.workspace}}/build
         shell: bash
diff --git a/check/CMakeLists.txt b/check/CMakeLists.txt
index 55f83384a8..c35dd4cb55 100644
--- a/check/CMakeLists.txt
+++ b/check/CMakeLists.txt
@@ -159,7 +159,9 @@ if ((NOT FAST_BUILD OR ALL_TESTS) AND NOT (BUILD_EXTRA_UNIT_ONLY))
   add_test(NAME capi_unit_tests COMMAND capi_unit_tests)
 
   # Check whether test executable builds OK.
-  if (NOT HIGHS_COVERAGE)
+  if ((NOT HIGHS_COVERAGE) AND
+        (NOT BUILD_OPENBLAS OR
+        (LINUX AND CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64")))
     add_test(NAME unit-test-build
             COMMAND ${CMAKE_COMMAND}
                     --build ${HIGHS_BINARY_DIR}
@@ -258,8 +260,8 @@ if ((NOT FAST_BUILD OR ALL_TESTS) AND NOT (BUILD_EXTRA_UNIT_ONLY))
 
   set(failInstances
       )
-  
-  set(mipInstances 
+
+  set(mipInstances
       "small_mip\;3.2368421\;"
       "flugpl\;1201500\;"
       "lseu\;1120|1119.9999999\;"
@@ -284,7 +286,9 @@ if ((NOT FAST_BUILD OR ALL_TESTS) AND NOT (BUILD_EXTRA_UNIT_ONLY))
   #   "--parallel=on"
       )
 
-  if (UNIX AND NOT APPLE AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
+  if (UNIX AND NOT APPLE AND
+        NOT CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM"
+        AND CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64")
     if (CUPDLP_GPU)
         set(pdlpInstances
             "25fv47\; 5.501847\;"
@@ -318,7 +322,9 @@ if ((NOT FAST_BUILD OR ALL_TESTS) AND NOT (BUILD_EXTRA_UNIT_ONLY))
             "standgub\; 1.25769944\;"
             )
     endif()
-  elseif(WIN32 AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
+  elseif(WIN32 AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM" AND
+            NOT (CMAKE_SIZEOF_VOID_P EQUAL 4) AND
+            CMAKE_SYSTEM_PROCESSOR MATCHES "AMD64|x86_64")
     if (CUPDLP_GPU)
         set(pdlpInstances
             "25fv47\; 5.50184\;"
@@ -435,7 +441,8 @@ if ((NOT FAST_BUILD OR ALL_TESTS) AND NOT (BUILD_EXTRA_UNIT_ONLY))
     if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "riscv64")
         add_instancetests(successRiscVInstances "Optimal")
     endif()
-  else()
+  elseif(NOT (CMAKE_SYSTEM_PROCESSOR MATCHES "arm|aarch64") AND
+             NOT (CMAKE_SIZEOF_VOID_P EQUAL 4))
     add_instancetests(successInstances "Optimal")
   endif()
 
diff --git a/cmake/FindHipoDeps.cmake b/cmake/FindHipoDeps.cmake
index 21233a5f09..5519d4326d 100644
--- a/cmake/FindHipoDeps.cmake
+++ b/cmake/FindHipoDeps.cmake
@@ -121,6 +121,11 @@ if (BUILD_OPENBLAS)
         CMAKE_ARGS ${OPENBLAS_MINIMAL_FLAGS}
     )
     FetchContent_MakeAvailable(openblas)
+
+    if (ALL_TESTS)
+        set(BUILD_TESTING ON)
+    endif()
+
     list(POP_BACK CMAKE_MESSAGE_INDENT)
     message(CHECK_PASS "fetched")