--- Cbc/src/CbcModel.cpp
+++ Cbc/src/CbcModel.cpp
@@ -5363,7 +5363,7 @@
         OsiClpSolverInterface * clpSolver
         = dynamic_cast<OsiClpSolverInterface *> (solver_);
         if (clpSolver)
-            clpSolver->setFakeObjective(reinterpret_cast<double *> (NULL));
+            clpSolver->setFakeObjective(static_cast<double *>(nullptr));
     }
 #endif
     moreSpecialOptions_ = saveMoreSpecialOptions;
--- Cgl/src/CglLandP/CglLandPUtils.hpp
+++ Cgl/src/CglLandP/CglLandPUtils.hpp
@@ -85,7 +85,7 @@
     /** resize vector.*/
     void resize(unsigned int i)
     {
-        cuts_.resize(i, reinterpret_cast<OsiRowCut *> (NULL));
+        cuts_.resize(i, static_cast<OsiRowCut *>(nullptr));
     }
 private:
     /** Stores the number of cuts.*/
--- Clp/src/AbcSimplex.cpp
+++ Clp/src/AbcSimplex.cpp
@@ -368,19 +368,19 @@
     // say Steepest pricing
     abcDualRowPivot_ = new AbcDualRowSteepest();
     abcPrimalColumnPivot_ = new AbcPrimalColumnSteepest();
-    internalStatus_ = newArray(reinterpret_cast<unsigned char *>(NULL),
+    internalStatus_ = newArray(static_cast<unsigned char *>(nullptr),
 			       sizeArray+maximumNumberTotal_);
-    abcLower_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-    abcUpper_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-    abcCost_ = newArray(reinterpret_cast<double *>(NULL),sizeArray+maximumNumberTotal_);
-    abcDj_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-    abcSolution_ = newArray(reinterpret_cast<double *>(NULL),sizeArray+maximumNumberTotal_);
-    //fromExternal_ = newArray(reinterpret_cast<int *>(NULL),sizeArray);
-    //toExternal_ = newArray(reinterpret_cast<int *>(NULL),sizeArray);
-    scaleFromExternal_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-    offset_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-    abcPerturbation_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-    abcPivotVariable_ = newArray(reinterpret_cast<int *>(NULL),maximumAbcNumberRows_);
+    abcLower_ = newArray(static_cast<double *>(nullptr),sizeArray);
+    abcUpper_ = newArray(static_cast<double *>(nullptr),sizeArray);
+    abcCost_ = newArray(static_cast<double *>(nullptr),sizeArray+maximumNumberTotal_);
+    abcDj_ = newArray(static_cast<double *>(nullptr),sizeArray);
+    abcSolution_ = newArray(static_cast<double *>(nullptr),sizeArray+maximumNumberTotal_);
+    //fromExternal_ = newArray(static_cast<int *>(nullptr),sizeArray);
+    //toExternal_ = newArray(static_cast<int *>(nullptr),sizeArray);
+    scaleFromExternal_ = newArray(static_cast<double *>(nullptr),sizeArray);
+    offset_ = newArray(static_cast<double *>(nullptr),sizeArray);
+    abcPerturbation_ = newArray(static_cast<double *>(nullptr),sizeArray);
+    abcPivotVariable_ = newArray(static_cast<int *>(nullptr),maximumAbcNumberRows_);
     // Fill perturbation array
     setupPointers(maximumAbcNumberRows_,maximumAbcNumberColumns_);
     fillPerturbation(0,maximumNumberTotal_);
@@ -554,19 +554,19 @@
   subProblem->maximumNumberTotal_= maximumAbcNumberRows_+numberColumns;
   subProblem->numberTotalWithoutFixed_= subProblem->numberTotal_;
   int sizeArray=2*subProblem->maximumNumberTotal_+maximumAbcNumberRows_;
-  subProblem->internalStatus_ = newArray(reinterpret_cast<unsigned char *>(NULL),
+  subProblem->internalStatus_ = newArray(static_cast<unsigned char *>(nullptr),
 					 sizeArray+subProblem->maximumNumberTotal_);
-  subProblem->abcLower_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-  subProblem->abcUpper_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-  subProblem->abcCost_ = newArray(reinterpret_cast<double *>(NULL),sizeArray+subProblem->maximumNumberTotal_);
-  subProblem->abcDj_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-  subProblem->abcSolution_ = newArray(reinterpret_cast<double *>(NULL),sizeArray+subProblem->maximumNumberTotal_);
-  //fromExternal_ = newArray(reinterpret_cast<int *>(NULL),sizeArray);
-  //toExternal_ = newArray(reinterpret_cast<int *>(NULL),sizeArray);
-  subProblem->scaleFromExternal_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-  subProblem->offset_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-  subProblem->abcPerturbation_ = newArray(reinterpret_cast<double *>(NULL),sizeArray);
-  subProblem->abcPivotVariable_ = newArray(reinterpret_cast<int *>(NULL),maximumAbcNumberRows_);
+  subProblem->abcLower_ = newArray(static_cast<double *>(nullptr),sizeArray);
+  subProblem->abcUpper_ = newArray(static_cast<double *>(nullptr),sizeArray);
+  subProblem->abcCost_ = newArray(static_cast<double *>(nullptr),sizeArray+subProblem->maximumNumberTotal_);
+  subProblem->abcDj_ = newArray(static_cast<double *>(nullptr),sizeArray);
+  subProblem->abcSolution_ = newArray(static_cast<double *>(nullptr),sizeArray+subProblem->maximumNumberTotal_);
+  //fromExternal_ = newArray(static_cast<int *>(nullptr),sizeArray);
+  //toExternal_ = newArray(static_cast<int *>(nullptr),sizeArray);
+  subProblem->scaleFromExternal_ = newArray(static_cast<double *>(nullptr),sizeArray);
+  subProblem->offset_ = newArray(static_cast<double *>(nullptr),sizeArray);
+  subProblem->abcPerturbation_ = newArray(static_cast<double *>(nullptr),sizeArray);
+  subProblem->abcPivotVariable_ = newArray(static_cast<int *>(nullptr),maximumAbcNumberRows_);
   subProblem->setupPointers(maximumAbcNumberRows_,numberColumns);
   // could use arrays - but for now be safe
   int * backward = new int [numberFullColumns+numberRows_];
--- Clp/src/ClpModel.cpp
+++ Clp/src/ClpModel.cpp
@@ -3845,7 +3845,7 @@
      writer.setMpsData(*(matrix_->getPackedMatrix()), COIN_DBL_MAX,
                        getColLower(), getColUpper(),
                        objective,
-                       reinterpret_cast<const char*> (NULL) /*integrality*/,
+                       static_cast<const char*>(nullptr) /*integrality*/,
                        getRowLower(), getRowUpper(),
                        columnNames, rowNames);
      // Pass in array saying if each variable integer
--- Clp/src/OsiClp/OsiClpSolverInterface.cpp
+++ Clp/src/OsiClp/OsiClpSolverInterface.cpp
@@ -1448,7 +1448,7 @@
   if (stopPrinting) {
     CoinMessages * messagesPointer = modelPtr_->messagesPointer();
     // won't even build messages 
-    messagesPointer->setDetailMessages(100,10000,reinterpret_cast<int *> (NULL));
+    messagesPointer->setDetailMessages(100,10000,static_cast<int *>(nullptr));
   }
 #endif
 }