diff --git a/.github/workflows/build_python.yml b/.github/workflows/build_python.yml
index 925d866ade..ac1d939134 100644
--- a/.github/workflows/build_python.yml
+++ b/.github/workflows/build_python.yml
@@ -83,12 +83,12 @@ jobs:
       - name: Build wheels
         uses: pypa/cibuildwheel@v3.3.0
 
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: cibw-wheels-${{ matrix.os }}-${{ strategy.job-index }}
           path: ./wheelhouse/*.whl
 
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: coverage-report-${{ matrix.os }}-${{ strategy.job-index }}
           path: ./prima_htmlcov
@@ -103,7 +103,7 @@ jobs:
       - name: Build sdist
         run: pipx run build --sdist
 
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: cibw-sdist
           path: dist/*.tar.gz
diff --git a/.github/workflows/compile_mex.yml b/.github/workflows/compile_mex.yml
index ad5bfa38e8..df13969ebe 100644
--- a/.github/workflows/compile_mex.yml
+++ b/.github/workflows/compile_mex.yml
@@ -169,7 +169,7 @@ jobs:
             testprima;
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: prima-${{ matrix.os }}-${{ matrix.matlab }}
           path: |
@@ -227,7 +227,7 @@ jobs:
   #           testprima;
 
   #     - name: Store artifacts
-  #       uses: actions/upload-artifact@v5
+  #       uses: actions/upload-artifact@v6
   #       with:
   #         name: prima-macos-arm64-${{ env.MATLAB_VERSION }}
   #         path: |
diff --git a/.github/workflows/parallel_test_matlab.yml b/.github/workflows/parallel_test_matlab.yml
index ec7312def1..b6e23987ab 100644
--- a/.github/workflows/parallel_test_matlab.yml
+++ b/.github/workflows/parallel_test_matlab.yml
@@ -212,7 +212,7 @@ jobs:
 
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}
diff --git a/.github/workflows/parallel_test_matlab_mac.yml b/.github/workflows/parallel_test_matlab_mac.yml
index 0a0d6ea27b..b214708d1a 100644
--- a/.github/workflows/parallel_test_matlab_mac.yml
+++ b/.github/workflows/parallel_test_matlab_mac.yml
@@ -44,7 +44,7 @@ jobs:
         run: ${{ env.MATLAB }} -nojvm -batch "ver; root_dir = pwd(); cd(fullfile(root_dir, 'matlab/tests')); parallel('${{ matrix.solver }}'); copy_crash_dump_files(root_dir, true);"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}
diff --git a/.github/workflows/profile_all.yml b/.github/workflows/profile_all.yml
index 4e89da814a..c045ff15d5 100644
--- a/.github/workflows/profile_all.yml
+++ b/.github/workflows/profile_all.yml
@@ -262,7 +262,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.with_optim_toolbox }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}-${{ matrix.test_feasibility_problems }}
@@ -286,7 +286,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_all_sq.yml b/.github/workflows/profile_all_sq.yml
index 5cfded9a93..043d60bbfe 100644
--- a/.github/workflows/profile_all_sq.yml
+++ b/.github/workflows/profile_all_sq.yml
@@ -265,7 +265,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.precision }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}-${{ matrix.test_feasibility_problems }}
@@ -305,7 +305,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_bobyqa_small.yml b/.github/workflows/profile_bobyqa_small.yml
index 11ebb5c184..1147791feb 100644
--- a/.github/workflows/profile_bobyqa_small.yml
+++ b/.github/workflows/profile_bobyqa_small.yml
@@ -194,7 +194,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.use_system_libgcc }}
@@ -218,7 +218,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_bobyqa_small_sq.yml b/.github/workflows/profile_bobyqa_small_sq.yml
index bca59360d6..0b455fa2fb 100644
--- a/.github/workflows/profile_bobyqa_small_sq.yml
+++ b/.github/workflows/profile_bobyqa_small_sq.yml
@@ -197,7 +197,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.precision }}-${{ matrix.use_system_libgcc }}
@@ -236,7 +236,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_cobyla_small.yml b/.github/workflows/profile_cobyla_small.yml
index df5247c5df..8aea79bdae 100644
--- a/.github/workflows/profile_cobyla_small.yml
+++ b/.github/workflows/profile_cobyla_small.yml
@@ -232,7 +232,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.with_optim_toolbox }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}-${{ matrix.test_feasibility_problems }}
@@ -256,7 +256,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_cobyla_small_sq.yml b/.github/workflows/profile_cobyla_small_sq.yml
index 8926fbfd04..97908eb7ec 100644
--- a/.github/workflows/profile_cobyla_small_sq.yml
+++ b/.github/workflows/profile_cobyla_small_sq.yml
@@ -223,7 +223,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.precision }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}-${{ matrix.test_feasibility_problems }}
@@ -262,7 +262,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_compiler_options.yml b/.github/workflows/profile_compiler_options.yml
index 9182c6c0a2..ae393cc471 100644
--- a/.github/workflows/profile_compiler_options.yml
+++ b/.github/workflows/profile_compiler_options.yml
@@ -229,7 +229,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.compiler_options }}-${{ matrix.use_system_libgcc }}
@@ -270,7 +270,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_infnan.yml b/.github/workflows/profile_infnan.yml
index 9341f9b006..0ef870676d 100644
--- a/.github/workflows/profile_infnan.yml
+++ b/.github/workflows/profile_infnan.yml
@@ -229,7 +229,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.compiler_options }}-${{ matrix.use_system_libgcc }}
@@ -270,7 +270,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_integer_kind.yml b/.github/workflows/profile_integer_kind.yml
index 2db0d799bb..7bc8fa6986 100644
--- a/.github/workflows/profile_integer_kind.yml
+++ b/.github/workflows/profile_integer_kind.yml
@@ -239,7 +239,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.compiler_options }}-${{ matrix.ik }}-${{ matrix.use_system_libgcc }}
@@ -280,7 +280,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_intrinsic_linalg.yml b/.github/workflows/profile_intrinsic_linalg.yml
index 15a52c48ff..778d7c2531 100644
--- a/.github/workflows/profile_intrinsic_linalg.yml
+++ b/.github/workflows/profile_intrinsic_linalg.yml
@@ -261,7 +261,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.precision }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}
@@ -301,7 +301,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_lincoa_small.yml b/.github/workflows/profile_lincoa_small.yml
index d38dc313f4..e4d078e09f 100644
--- a/.github/workflows/profile_lincoa_small.yml
+++ b/.github/workflows/profile_lincoa_small.yml
@@ -222,7 +222,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.with_optim_toolbox }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}-${{ matrix.test_feasibility_problems }}
@@ -246,7 +246,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_lincoa_small_sq.yml b/.github/workflows/profile_lincoa_small_sq.yml
index 792e99e673..e307d38ae1 100644
--- a/.github/workflows/profile_lincoa_small_sq.yml
+++ b/.github/workflows/profile_lincoa_small_sq.yml
@@ -223,7 +223,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.precision }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}-${{ matrix.test_feasibility_problems }}
@@ -263,7 +263,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_newuoa_small.yml b/.github/workflows/profile_newuoa_small.yml
index 5292a5ff08..2bc8fea75b 100644
--- a/.github/workflows/profile_newuoa_small.yml
+++ b/.github/workflows/profile_newuoa_small.yml
@@ -192,7 +192,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.use_system_libgcc }}
@@ -216,7 +216,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_newuoa_small_sq.yml b/.github/workflows/profile_newuoa_small_sq.yml
index c26f3b94e7..7036fc4b3b 100644
--- a/.github/workflows/profile_newuoa_small_sq.yml
+++ b/.github/workflows/profile_newuoa_small_sq.yml
@@ -197,7 +197,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.precision }}-${{ matrix.use_system_libgcc }}
@@ -236,7 +236,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_npt.yml b/.github/workflows/profile_npt.yml
index fbfd56b5c5..5d1cb97c57 100644
--- a/.github/workflows/profile_npt.yml
+++ b/.github/workflows/profile_npt.yml
@@ -270,7 +270,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ env.NPT }}-${{ matrix.use_system_libgcc }}
@@ -311,7 +311,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_prima_small.yml b/.github/workflows/profile_prima_small.yml
index 2463004a20..c2a00fce21 100644
--- a/.github/workflows/profile_prima_small.yml
+++ b/.github/workflows/profile_prima_small.yml
@@ -226,7 +226,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.with_optim_toolbox }}-${{ matrix.ctol_indicator }}-${{ matrix.use_system_libgcc }}
@@ -251,7 +251,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_quadruple.yml b/.github/workflows/profile_quadruple.yml
index 8b765091c5..2bcb3096ef 100644
--- a/.github/workflows/profile_quadruple.yml
+++ b/.github/workflows/profile_quadruple.yml
@@ -201,7 +201,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.use_system_libgcc }}
@@ -239,7 +239,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_rescue_idz_classical.yml b/.github/workflows/profile_rescue_idz_classical.yml
index 7116d2b969..ab8e9ec798 100644
--- a/.github/workflows/profile_rescue_idz_classical.yml
+++ b/.github/workflows/profile_rescue_idz_classical.yml
@@ -250,7 +250,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.variant }}-${{ matrix.precision }}-${{ matrix.use_system_libgcc }}
@@ -275,7 +275,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_rescue_idz_modernized.yml b/.github/workflows/profile_rescue_idz_modernized.yml
index 41e5338b2e..bc33ad8b89 100644
--- a/.github/workflows/profile_rescue_idz_modernized.yml
+++ b/.github/workflows/profile_rescue_idz_modernized.yml
@@ -245,7 +245,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.variant }}-${{ matrix.precision }}-${{ matrix.use_system_libgcc }}
@@ -270,7 +270,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_single.yml b/.github/workflows/profile_single.yml
index 340e9bbcf5..e04e5b5cda 100644
--- a/.github/workflows/profile_single.yml
+++ b/.github/workflows/profile_single.yml
@@ -200,7 +200,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.use_system_libgcc }}
@@ -224,7 +224,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_uobyqa_small.yml b/.github/workflows/profile_uobyqa_small.yml
index 594eb0a759..ebd4426833 100644
--- a/.github/workflows/profile_uobyqa_small.yml
+++ b/.github/workflows/profile_uobyqa_small.yml
@@ -192,7 +192,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.use_system_libgcc }}
@@ -216,7 +216,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/profile_uobyqa_small_sq.yml b/.github/workflows/profile_uobyqa_small_sq.yml
index 1dd3e865a2..496022d480 100644
--- a/.github/workflows/profile_uobyqa_small_sq.yml
+++ b/.github/workflows/profile_uobyqa_small_sq.yml
@@ -199,7 +199,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.competitor }}-${{ matrix.precision }}-${{ matrix.use_system_libgcc }}
@@ -238,7 +238,7 @@ jobs:
     needs: test
     steps:
       - name: Merge Artifacts
-        uses: actions/upload-artifact/merge@v5
+        uses: actions/upload-artifact/merge@v6
         with:
           name: 00-merged-artifacts
           pattern: artifact-*
diff --git a/.github/workflows/recursive_test_matlab.yml b/.github/workflows/recursive_test_matlab.yml
index 77db5dccae..d8d422a4f7 100644
--- a/.github/workflows/recursive_test_matlab.yml
+++ b/.github/workflows/recursive_test_matlab.yml
@@ -214,7 +214,7 @@ jobs:
 
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}
diff --git a/.github/workflows/recursive_test_matlab_mac.yml b/.github/workflows/recursive_test_matlab_mac.yml
index db1a47e73c..bd1e6c4eb3 100644
--- a/.github/workflows/recursive_test_matlab_mac.yml
+++ b/.github/workflows/recursive_test_matlab_mac.yml
@@ -44,7 +44,7 @@ jobs:
         run: ${{ env.MATLAB }} -nojvm -batch "ver; root_dir = pwd(); cd(fullfile(root_dir, 'matlab/tests')); recursive('${{ matrix.solver }}'); copy_crash_dump_files(root_dir, true);"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}
diff --git a/.github/workflows/stress_test_fortran.yml b/.github/workflows/stress_test_fortran.yml
index 34955294e3..0858d3357e 100644
--- a/.github/workflows/stress_test_fortran.yml
+++ b/.github/workflows/stress_test_fortran.yml
@@ -125,7 +125,7 @@ jobs:
           make ${{ matrix.compiler }}test_i2_r${RK}_d1_tst.${{ matrix.solver }}
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.os }}-${{ matrix.solver }}-${{ matrix.compiler }}-${{ matrix.testdim }}
diff --git a/.github/workflows/stress_test_matlab_mac.yml b/.github/workflows/stress_test_matlab_mac.yml
index d77ebc5f77..0edead997b 100644
--- a/.github/workflows/stress_test_matlab_mac.yml
+++ b/.github/workflows/stress_test_matlab_mac.yml
@@ -60,7 +60,7 @@ jobs:
             fi
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}
diff --git a/.github/workflows/test_aflang.yml b/.github/workflows/test_aflang.yml
index b286e90429..e944470d80 100644
--- a/.github/workflows/test_aflang.yml
+++ b/.github/workflows/test_aflang.yml
@@ -92,7 +92,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make mtest && make clean && make dtest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_armflang_pi.yml b/.github/workflows/test_armflang_pi.yml
index e534c8efbb..c9cedd572b 100644
--- a/.github/workflows/test_armflang_pi.yml
+++ b/.github/workflows/test_armflang_pi.yml
@@ -71,7 +71,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make rtest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_flang.yml b/.github/workflows/test_flang.yml
index 68f1ddd49c..6041d8dcca 100644
--- a/.github/workflows/test_flang.yml
+++ b/.github/workflows/test_flang.yml
@@ -108,7 +108,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make ftest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_flang_pi.yml b/.github/workflows/test_flang_pi.yml
index 7dc019791f..51d933750d 100644
--- a/.github/workflows/test_flang_pi.yml
+++ b/.github/workflows/test_flang_pi.yml
@@ -67,7 +67,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make ftest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_g95.yml b/.github/workflows/test_g95.yml
index 37d772ef99..b72c671dfc 100644
--- a/.github/workflows/test_g95.yml
+++ b/.github/workflows/test_g95.yml
@@ -75,7 +75,7 @@ jobs:
           # to problems like un-found modules. Not yet observed for other tests.
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}
diff --git a/.github/workflows/test_gfortran.yml b/.github/workflows/test_gfortran.yml
index 1c38c41861..d3b0e89239 100644
--- a/.github/workflows/test_gfortran.yml
+++ b/.github/workflows/test_gfortran.yml
@@ -147,7 +147,7 @@ jobs:
             export EXAMPLE_NUM=2 && make clean && make gtest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         # Note that `$TEST_DIR` does not work on Windows, where its equivalent is `$env:TEST_DIR`.
         # In the following, we enquire `$TEST_DIR` by using the `env` context, which is platform independent.
diff --git a/.github/workflows/test_gfortran_pi64.yml b/.github/workflows/test_gfortran_pi64.yml
index 7b5423fb5b..3f5253651e 100644
--- a/.github/workflows/test_gfortran_pi64.yml
+++ b/.github/workflows/test_gfortran_pi64.yml
@@ -78,7 +78,7 @@ jobs:
             export EXAMPLE_NUM=2 && make clean && make gtest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         # Note that `$TEST_DIR` does not work on Windows, where its equivalent is `$env:TEST_DIR`.
         # In the following, we enquire `$TEST_DIR` by using the `env` context, which is platform independent.
diff --git a/.github/workflows/test_ifort.yml b/.github/workflows/test_ifort.yml
index b6e58b40fb..c2e99991f1 100644
--- a/.github/workflows/test_ifort.yml
+++ b/.github/workflows/test_ifort.yml
@@ -120,7 +120,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make itest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.os }}-${{ matrix.solver }}-${{ env.IK }}-${{ env.FFLAGS }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_ifx.yml b/.github/workflows/test_ifx.yml
index e547116e59..a3ff613b93 100644
--- a/.github/workflows/test_ifx.yml
+++ b/.github/workflows/test_ifx.yml
@@ -118,7 +118,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make xtest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_nagfor.yml b/.github/workflows/test_nagfor.yml
index 422b7ab501..e8e05c48c8 100644
--- a/.github/workflows/test_nagfor.yml
+++ b/.github/workflows/test_nagfor.yml
@@ -66,7 +66,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make ntest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.testdim }}-${{ env.FFLAGS }}
diff --git a/.github/workflows/test_nagfor_mac.yml b/.github/workflows/test_nagfor_mac.yml
index 59e5cb19c7..adaff663b8 100644
--- a/.github/workflows/test_nagfor_mac.yml
+++ b/.github/workflows/test_nagfor_mac.yml
@@ -65,7 +65,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make ntest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.testdim }}-${{ env.FFLAGS }}
diff --git a/.github/workflows/test_nvfortran.yml b/.github/workflows/test_nvfortran.yml
index db61154086..5d63d662b3 100644
--- a/.github/workflows/test_nvfortran.yml
+++ b/.github/workflows/test_nvfortran.yml
@@ -95,7 +95,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make vtest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_nvfortran_pi.yml b/.github/workflows/test_nvfortran_pi.yml
index 041b76b38d..288010cd08 100644
--- a/.github/workflows/test_nvfortran_pi.yml
+++ b/.github/workflows/test_nvfortran_pi.yml
@@ -79,7 +79,7 @@ jobs:
           export EXAMPLE_NUM=2 && make clean && make vtest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/test_pyprima.yml b/.github/workflows/test_pyprima.yml
index 11065e004a..01069a7444 100644
--- a/.github/workflows/test_pyprima.yml
+++ b/.github/workflows/test_pyprima.yml
@@ -45,7 +45,7 @@ jobs:
 
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         id: artifact-coverage
         with:
           name: coverage-html-${{ matrix.os }}
diff --git a/.github/workflows/test_sunf95.yml b/.github/workflows/test_sunf95.yml
index 42dbb39905..1837c1ac97 100644
--- a/.github/workflows/test_sunf95.yml
+++ b/.github/workflows/test_sunf95.yml
@@ -97,7 +97,7 @@ jobs:
           # export EXAMPLE_NUM=2 && make clean && make stest
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: ${{ matrix.solver }}-${{ env.IK }}-${{ matrix.fflags }}-${{ matrix.testdim }}
diff --git a/.github/workflows/verify_big.yml b/.github/workflows/verify_big.yml
index 17744451a4..5f3f862658 100644
--- a/.github/workflows/verify_big.yml
+++ b/.github/workflows/verify_big.yml
@@ -198,7 +198,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.matlab }}-${{ matrix.use_system_libgcc }}-${{ matrix.os }}
diff --git a/.github/workflows/verify_large.yml b/.github/workflows/verify_large.yml
index 7647d60b8d..a5a32a733d 100644
--- a/.github/workflows/verify_large.yml
+++ b/.github/workflows/verify_large.yml
@@ -199,7 +199,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.matlab }}-${{ matrix.use_system_libgcc }}-${{ matrix.os }}
diff --git a/.github/workflows/verify_small.yml b/.github/workflows/verify_small.yml
index 6985d0a492..95831a1687 100644
--- a/.github/workflows/verify_small.yml
+++ b/.github/workflows/verify_small.yml
@@ -197,7 +197,7 @@ jobs:
           printf "\n<<<<<<<<<<<<<<<<\n\n"
 
       - name: Store artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         if: always()  # Always run even if the workflow is canceled manually or due to overtime.
         with:
           name: artifact-${{ matrix.solver }}-${{ matrix.dim }}-${{ matrix.matlab }}-${{ matrix.use_system_libgcc }}-${{ matrix.os }}