From 0f1670800920862ecf3b9c3733d689ca2eeb3342 Mon Sep 17 00:00:00 2001
From: Marc Fehling <mafehling.git@gmail.com>
Date: Fri, 28 Nov 2025 10:14:56 +0100
Subject: [PATCH] Bump deal.II version requirement to 9.6.0.

---
 .github/workflows/linux.yml                      |  2 +-
 CeresFE/CMakeLists.txt                           |  2 +-
 Crystal_Growth_Phase_Field_Model/CMakeLists.txt  |  2 +-
 Distributed_LDG_Method/CMakeLists.txt            |  2 +-
 Distributed_Moving_Laser_Heating/CMakeLists.txt  |  2 +-
 ElastoplasticTorsion/CMakeLists.txt              |  2 +-
 Heat_Eqn_Parallel/CMakeLists.txt                 |  2 +-
 .../CMakeLists.txt                               |  2 +-
 MCMC-Laplace/CMakeLists.txt                      |  2 +-
 Maxwell-Eigenvalue-hp-Refinement/CMakeLists.txt  |  2 +-
 Maxwell-Eigenvalue-hp-Refinement/maxwell-hp.cc   | 16 ++--------------
 .../CMakeLists.txt                               |  2 +-
 NavierStokes_TRBDF2_DG/CMakeLists.txt            |  2 +-
 Nonlinear_PoroViscoelasticity/CMakeLists.txt     |  2 +-
 .../nonlinear-poro-viscoelasticity.cc            |  4 ----
 Phase_field_fracture_model_in_3D/CMakeLists.txt  |  2 +-
 .../CMakeLists.txt                               |  2 +-
 .../CMakeLists.txt                               |  2 +-
 .../viscoelastic_strip_with_hole.cc              |  4 ----
 Swift-Hohenberg-Solver/CMakeLists.txt            |  2 +-
 TravelingWaves/CMakeLists.txt                    |  2 +-
 advection_reaction_estimator/CMakeLists.txt      |  2 +-
 cdr/CMakeLists.txt                               |  2 +-
 coupled_laplace_problem/CMakeLists.txt           |  2 +-
 goal_oriented_elastoplasticity/CMakeLists.txt    |  2 +-
 information_based_mesh_refinement/CMakeLists.txt |  2 +-
 .../CMakeLists.txt                               |  2 +-
 parallel_in_time/CMakeLists.txt                  |  2 +-
 time_dependent_navier_stokes/CMakeLists.txt      |  2 +-
 two_phase_flow/CMakeLists.txt                    |  2 +-
 two_phase_flow/LevelSetSolver.cc                 |  4 ----
 two_phase_flow/MultiPhase.cc                     |  4 ----
 two_phase_flow/NavierStokesSolver.cc             |  8 --------
 two_phase_flow/TestLevelSet.cc                   |  8 --------
 two_phase_flow/TestNavierStokes.cc               |  4 ----
 35 files changed, 29 insertions(+), 77 deletions(-)

diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 8fcb9be8..8322d2ef 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -23,7 +23,7 @@ jobs:
       fail-fast: false
       matrix:
         build_type: ["Debug"]
-        dealii_version: ["master", "v9.7.1", "v9.6.0", "v9.5.0"]
+        dealii_version: ["master", "v9.7.1", "v9.6.0"]
         ubuntu_version: ["jammy"]
         include:
           - build_type: "Debug"
diff --git a/CeresFE/CMakeLists.txt b/CeresFE/CMakeLists.txt
index 56d803d4..fd151347 100644
--- a/CeresFE/CMakeLists.txt
+++ b/CeresFE/CMakeLists.txt
@@ -4,7 +4,7 @@
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 
diff --git a/Crystal_Growth_Phase_Field_Model/CMakeLists.txt b/Crystal_Growth_Phase_Field_Model/CMakeLists.txt
index 0491fd08..23b57b01 100644
--- a/Crystal_Growth_Phase_Field_Model/CMakeLists.txt
+++ b/Crystal_Growth_Phase_Field_Model/CMakeLists.txt
@@ -17,7 +17,7 @@ SET(TARGET_SRC
         get_random_number.cpp
         )
 
-FIND_PACKAGE(deal.II 9.5.0 QUIET
+FIND_PACKAGE(deal.II 9.6.0 QUIET
         HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
         )
 IF(NOT ${deal.II_FOUND})
diff --git a/Distributed_LDG_Method/CMakeLists.txt b/Distributed_LDG_Method/CMakeLists.txt
index e630fd04..e0249ba3 100644
--- a/Distributed_LDG_Method/CMakeLists.txt
+++ b/Distributed_LDG_Method/CMakeLists.txt
@@ -18,7 +18,7 @@ SET(CLEAN_UP_FILES *.vtu *.pvtu *.visit)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Distributed_Moving_Laser_Heating/CMakeLists.txt b/Distributed_Moving_Laser_Heating/CMakeLists.txt
index 100396f6..de732a2e 100644
--- a/Distributed_Moving_Laser_Heating/CMakeLists.txt
+++ b/Distributed_Moving_Laser_Heating/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0 QUIET
+FIND_PACKAGE(deal.II 9.6.0 QUIET
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/ElastoplasticTorsion/CMakeLists.txt b/ElastoplasticTorsion/CMakeLists.txt
index 0622d5d5..059c5ac9 100644
--- a/ElastoplasticTorsion/CMakeLists.txt
+++ b/ElastoplasticTorsion/CMakeLists.txt
@@ -24,7 +24,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Heat_Eqn_Parallel/CMakeLists.txt b/Heat_Eqn_Parallel/CMakeLists.txt
index 6c787b56..498214be 100644
--- a/Heat_Eqn_Parallel/CMakeLists.txt
+++ b/Heat_Eqn_Parallel/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Linear_Elastic_Active_Skeletal_Muscle_Model/CMakeLists.txt b/Linear_Elastic_Active_Skeletal_Muscle_Model/CMakeLists.txt
index b0b832b8..2682a08f 100644
--- a/Linear_Elastic_Active_Skeletal_Muscle_Model/CMakeLists.txt
+++ b/Linear_Elastic_Active_Skeletal_Muscle_Model/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/MCMC-Laplace/CMakeLists.txt b/MCMC-Laplace/CMakeLists.txt
index f8bf8fd8..fc34f8d3 100644
--- a/MCMC-Laplace/CMakeLists.txt
+++ b/MCMC-Laplace/CMakeLists.txt
@@ -4,7 +4,7 @@
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 
diff --git a/Maxwell-Eigenvalue-hp-Refinement/CMakeLists.txt b/Maxwell-Eigenvalue-hp-Refinement/CMakeLists.txt
index e53edea1..ccaa2c29 100644
--- a/Maxwell-Eigenvalue-hp-Refinement/CMakeLists.txt
+++ b/Maxwell-Eigenvalue-hp-Refinement/CMakeLists.txt
@@ -10,7 +10,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Maxwell-Eigenvalue-hp-Refinement/maxwell-hp.cc b/Maxwell-Eigenvalue-hp-Refinement/maxwell-hp.cc
index c47a08e9..28f9607b 100644
--- a/Maxwell-Eigenvalue-hp-Refinement/maxwell-hp.cc
+++ b/Maxwell-Eigenvalue-hp-Refinement/maxwell-hp.cc
@@ -1673,12 +1673,8 @@ namespace ErrorIndicators
     void
     prune_eigenpairs(const double &TOL);
 
-#if DEAL_II_VERSION_GTE(9, 6, 0)
-    std::vector<const ReadVector<PetscScalar> *>    eigenfunction_ptrs;
-#else
-    std::vector<const PETScWrappers::MPI::Vector *> eigenfunction_ptrs;
-#endif
-    std::vector<const double *>                     eigenvalue_ptrs;
+    std::vector<const ReadVector<PetscScalar> *> eigenfunction_ptrs;
+    std::vector<const double *>                  eigenvalue_ptrs;
 
     std::vector<std::shared_ptr<Vector<float>>> errors;
   };
@@ -1808,7 +1804,6 @@ namespace ErrorIndicators
         estimated_error_per_cell[i] = errors[i].get();
       }
 
-#if DEAL_II_VERSION_GTE(9, 6, 0)
     const auto solution_view = make_array_view(eigenfunction_ptrs);
     auto error_view = make_array_view(estimated_error_per_cell);
     KellyErrorEstimator<dim>::estimate(this->dof_handler,
@@ -1816,13 +1811,6 @@ namespace ErrorIndicators
                                        {},
                                        solution_view,
                                        error_view);
-#else
-    KellyErrorEstimator<dim>::estimate(this->dof_handler,
-                                       *this->face_quadrature_collection,
-                                       {},
-                                       eigenfunction_ptrs,
-                                       estimated_error_per_cell);
-#endif
 
     for (auto &error_vec : errors)
       {
diff --git a/MultipointFluxMixedFiniteElementMethods/CMakeLists.txt b/MultipointFluxMixedFiniteElementMethods/CMakeLists.txt
index 2371e7f3..6ef403ac 100644
--- a/MultipointFluxMixedFiniteElementMethods/CMakeLists.txt
+++ b/MultipointFluxMixedFiniteElementMethods/CMakeLists.txt
@@ -24,7 +24,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/NavierStokes_TRBDF2_DG/CMakeLists.txt b/NavierStokes_TRBDF2_DG/CMakeLists.txt
index 50f256df..b575328e 100644
--- a/NavierStokes_TRBDF2_DG/CMakeLists.txt
+++ b/NavierStokes_TRBDF2_DG/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Nonlinear_PoroViscoelasticity/CMakeLists.txt b/Nonlinear_PoroViscoelasticity/CMakeLists.txt
index 84db5811..415df194 100644
--- a/Nonlinear_PoroViscoelasticity/CMakeLists.txt
+++ b/Nonlinear_PoroViscoelasticity/CMakeLists.txt
@@ -13,7 +13,7 @@ SET(TARGET_SRC
 #Search for required deal.II version
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Nonlinear_PoroViscoelasticity/nonlinear-poro-viscoelasticity.cc b/Nonlinear_PoroViscoelasticity/nonlinear-poro-viscoelasticity.cc
index e91026e4..7990b2bb 100644
--- a/Nonlinear_PoroViscoelasticity/nonlinear-poro-viscoelasticity.cc
+++ b/Nonlinear_PoroViscoelasticity/nonlinear-poro-viscoelasticity.cc
@@ -1970,11 +1970,7 @@ namespace NonLinearPoroViscoElasticity
         if (apply_dirichlet_bc)
         {
           constraints.clear();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
           constraints.reinit(locally_owned_dofs, locally_relevant_dofs);
-#else
-          constraints.reinit(locally_relevant_dofs);
-#endif
           make_dirichlet_constraints(constraints);
         }
         else
diff --git a/Phase_field_fracture_model_in_3D/CMakeLists.txt b/Phase_field_fracture_model_in_3D/CMakeLists.txt
index c827be07..12ef8dd6 100644
--- a/Phase_field_fracture_model_in_3D/CMakeLists.txt
+++ b/Phase_field_fracture_model_in_3D/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Quasi_static_Finite_strain_Compressible_Elasticity/CMakeLists.txt b/Quasi_static_Finite_strain_Compressible_Elasticity/CMakeLists.txt
index c71c2a9e..17eab8c8 100644
--- a/Quasi_static_Finite_strain_Compressible_Elasticity/CMakeLists.txt
+++ b/Quasi_static_Finite_strain_Compressible_Elasticity/CMakeLists.txt
@@ -20,7 +20,7 @@ SET(CLEAN_UP_FILES
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/CMakeLists.txt b/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/CMakeLists.txt
index 99c52572..f08d6840 100644
--- a/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/CMakeLists.txt
+++ b/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/CMakeLists.txt
@@ -19,7 +19,7 @@ SET(CLEAN_UP_FILES
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/viscoelastic_strip_with_hole.cc b/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/viscoelastic_strip_with_hole.cc
index 07ab3fca..154ca9d5 100644
--- a/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/viscoelastic_strip_with_hole.cc
+++ b/Quasi_static_Finite_strain_Quasi_incompressible_ViscoElasticity/viscoelastic_strip_with_hole.cc
@@ -1832,12 +1832,8 @@ namespace ViscoElasStripHole
     if (it_nr > 1)
       return;
     constraints.clear();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
     constraints.reinit (locally_owned_dofs,
                         locally_relevant_dofs);
-#else
-    constraints.reinit (locally_relevant_dofs);
-#endif
     
     const bool apply_dirichlet_bc = (it_nr == 0);
     const FEValuesExtractors::Scalar x_displacement(0);
diff --git a/Swift-Hohenberg-Solver/CMakeLists.txt b/Swift-Hohenberg-Solver/CMakeLists.txt
index 422ab2b2..df15d18c 100644
--- a/Swift-Hohenberg-Solver/CMakeLists.txt
+++ b/Swift-Hohenberg-Solver/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/TravelingWaves/CMakeLists.txt b/TravelingWaves/CMakeLists.txt
index dfc346e5..92c832c7 100644
--- a/TravelingWaves/CMakeLists.txt
+++ b/TravelingWaves/CMakeLists.txt
@@ -11,7 +11,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/advection_reaction_estimator/CMakeLists.txt b/advection_reaction_estimator/CMakeLists.txt
index 87b01806..e0d36a13 100644
--- a/advection_reaction_estimator/CMakeLists.txt
+++ b/advection_reaction_estimator/CMakeLists.txt
@@ -12,7 +12,7 @@ PROJECT(${TARGET} CXX)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/cdr/CMakeLists.txt b/cdr/CMakeLists.txt
index 843b4ccc..1caf299b 100644
--- a/cdr/CMakeLists.txt
+++ b/cdr/CMakeLists.txt
@@ -1,6 +1,6 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR})
 
 IF(NOT ${deal.II_FOUND})
diff --git a/coupled_laplace_problem/CMakeLists.txt b/coupled_laplace_problem/CMakeLists.txt
index 99883faa..3ae1cbbc 100644
--- a/coupled_laplace_problem/CMakeLists.txt
+++ b/coupled_laplace_problem/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/goal_oriented_elastoplasticity/CMakeLists.txt b/goal_oriented_elastoplasticity/CMakeLists.txt
index aead4549..542d272e 100644
--- a/goal_oriented_elastoplasticity/CMakeLists.txt
+++ b/goal_oriented_elastoplasticity/CMakeLists.txt
@@ -18,7 +18,7 @@ SET(CLEAN_UP_FILES *.vtu *.pvtu *.visit)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/information_based_mesh_refinement/CMakeLists.txt b/information_based_mesh_refinement/CMakeLists.txt
index 951014e6..c8028307 100644
--- a/information_based_mesh_refinement/CMakeLists.txt
+++ b/information_based_mesh_refinement/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/nonlinear-heat_transfer_with_AD_NOX/CMakeLists.txt b/nonlinear-heat_transfer_with_AD_NOX/CMakeLists.txt
index dc5825d3..3d9af0c2 100644
--- a/nonlinear-heat_transfer_with_AD_NOX/CMakeLists.txt
+++ b/nonlinear-heat_transfer_with_AD_NOX/CMakeLists.txt
@@ -1,6 +1,6 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
-FIND_PACKAGE(deal.II 9.5.0 QUIET
+FIND_PACKAGE(deal.II 9.6.0 QUIET
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/parallel_in_time/CMakeLists.txt b/parallel_in_time/CMakeLists.txt
index adb33969..0e80ee94 100644
--- a/parallel_in_time/CMakeLists.txt
+++ b/parallel_in_time/CMakeLists.txt
@@ -5,7 +5,7 @@ PROJECT("parallel_in_time")
 #
 # setup deal.II
 #
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/time_dependent_navier_stokes/CMakeLists.txt b/time_dependent_navier_stokes/CMakeLists.txt
index 820a1cba..fbf6d20b 100644
--- a/time_dependent_navier_stokes/CMakeLists.txt
+++ b/time_dependent_navier_stokes/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/two_phase_flow/CMakeLists.txt b/two_phase_flow/CMakeLists.txt
index 822f7c1e..278444d3 100644
--- a/two_phase_flow/CMakeLists.txt
+++ b/two_phase_flow/CMakeLists.txt
@@ -28,7 +28,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.13.4)
 
-FIND_PACKAGE(deal.II 9.5.0
+FIND_PACKAGE(deal.II 9.6.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/two_phase_flow/LevelSetSolver.cc b/two_phase_flow/LevelSetSolver.cc
index 28527278..c180e907 100644
--- a/two_phase_flow/LevelSetSolver.cc
+++ b/two_phase_flow/LevelSetSolver.cc
@@ -444,11 +444,7 @@ void LevelSetSolver<dim>::setup()
   // INIT CONSTRAINTS //
   //////////////////////
   constraints.clear ();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
   constraints.reinit (locally_owned_dofs_LS, locally_relevant_dofs_LS);
-#else
-  constraints.reinit (locally_relevant_dofs_LS);
-#endif
   DoFTools::make_hanging_node_constraints (dof_handler_LS, constraints);
   constraints.close ();
   /////////////////////////
diff --git a/two_phase_flow/MultiPhase.cc b/two_phase_flow/MultiPhase.cc
index 9cdb95fd..452b27c1 100644
--- a/two_phase_flow/MultiPhase.cc
+++ b/two_phase_flow/MultiPhase.cc
@@ -266,11 +266,7 @@ template <int dim>
 void MultiPhase<dim>::init_constraints()
 {
   constraints.clear ();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
   constraints.reinit (locally_owned_dofs_LS, locally_relevant_dofs_LS);
-#else
-  constraints.reinit (locally_relevant_dofs_LS);
-#endif
   DoFTools::make_hanging_node_constraints (dof_handler_LS, constraints);
   constraints.close ();
 }
diff --git a/two_phase_flow/NavierStokesSolver.cc b/two_phase_flow/NavierStokesSolver.cc
index f5387d5f..88ea5e72 100644
--- a/two_phase_flow/NavierStokesSolver.cc
+++ b/two_phase_flow/NavierStokesSolver.cc
@@ -607,20 +607,12 @@ void NavierStokesSolver<dim>::init_constraints()
 {
   //grl constraints
   constraints.clear();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
   constraints.reinit(locally_owned_dofs_U, locally_relevant_dofs_U);
-#else
-  constraints.reinit(locally_relevant_dofs_U);
-#endif
   DoFTools::make_hanging_node_constraints(dof_handler_U,constraints);
   constraints.close();
   //constraints for dpsi
   constraints_psi.clear();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
   constraints_psi.reinit(locally_owned_dofs_P, locally_relevant_dofs_P);
-#else
-  constraints_psi.reinit(locally_relevant_dofs_P);
-#endif
   DoFTools::make_hanging_node_constraints(dof_handler_P,constraints_psi);
   //if (constraints_psi.can_store_line(0))
   //constraints_psi.add_line(0); //constraint u0 = 0
diff --git a/two_phase_flow/TestLevelSet.cc b/two_phase_flow/TestLevelSet.cc
index 6c6ee0e8..77959890 100644
--- a/two_phase_flow/TestLevelSet.cc
+++ b/two_phase_flow/TestLevelSet.cc
@@ -394,19 +394,11 @@ template <int dim>
 void TestLevelSet<dim>::init_constraints()
 {
   constraints.clear ();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
   constraints.reinit (locally_owned_dofs_LS, locally_relevant_dofs_LS);
-#else
-  constraints.reinit (locally_relevant_dofs_LS);
-#endif
   DoFTools::make_hanging_node_constraints (dof_handler_LS, constraints);
   constraints.close ();
   constraints_disp_field.clear ();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
   constraints_disp_field.reinit (locally_owned_dofs_LS, locally_relevant_dofs_LS);
-#else
-  constraints_disp_field.reinit (locally_relevant_dofs_LS);
-#endif
   DoFTools::make_hanging_node_constraints (dof_handler_LS, constraints_disp_field);
   constraints_disp_field.close ();
 }
diff --git a/two_phase_flow/TestNavierStokes.cc b/two_phase_flow/TestNavierStokes.cc
index 35d94fb8..49df1eae 100644
--- a/two_phase_flow/TestNavierStokes.cc
+++ b/two_phase_flow/TestNavierStokes.cc
@@ -262,11 +262,7 @@ template <int dim>
 void TestNavierStokes<dim>::init_constraints()
 {
   constraints.clear ();
-#if DEAL_II_VERSION_GTE(9, 6, 0)
   constraints.reinit (locally_owned_dofs_LS, locally_relevant_dofs_LS);
-#else
-  constraints.reinit (locally_relevant_dofs_LS);
-#endif
   DoFTools::make_hanging_node_constraints (dof_handler_LS, constraints);
   constraints.close ();
 }