diff --git a/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/hexRef8.C b/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/hexRef8.C
index 7872d76afb4a839fc63a2919daa8e9d7c504ff41..fc0416f965f4aaded9f0d73eabc4b8f3c7ebd361 100644
--- a/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/hexRef8.C
+++ b/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/hexRef8.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -1938,7 +1938,7 @@ Foam::hexRef8::hexRef8(const polyMesh& mesh, const bool readHistory)
             polyMesh::meshSubDir,
             mesh_,
             IOobject::READ_IF_PRESENT,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         labelList(mesh_.nCells(), 0)
     ),
@@ -1951,7 +1951,7 @@ Foam::hexRef8::hexRef8(const polyMesh& mesh, const bool readHistory)
             polyMesh::meshSubDir,
             mesh_,
             IOobject::READ_IF_PRESENT,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         labelList(mesh_.nPoints(), 0)
     ),
@@ -1964,7 +1964,7 @@ Foam::hexRef8::hexRef8(const polyMesh& mesh, const bool readHistory)
             polyMesh::meshSubDir,
             mesh_,
             IOobject::READ_IF_PRESENT,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         dimensionedScalar("level0Edge", dimLength, getLevel0EdgeLength())
     ),
@@ -1977,9 +1977,10 @@ Foam::hexRef8::hexRef8(const polyMesh& mesh, const bool readHistory)
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
-        (readHistory ? mesh_.nCells() : 0)  // All cells visible if not be read
+        // All cells visible if not read or readHistory = false
+        (readHistory ? mesh_.nCells() : 0)
     ),
     faceRemover_(mesh_, GREAT),     // merge boundary faces wherever possible
     savedPointLevel_(0),
@@ -2063,7 +2064,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         cellLevel
     ),
@@ -2076,7 +2077,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         pointLevel
     ),
@@ -2089,7 +2090,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         dimensionedScalar
         (
@@ -2107,7 +2108,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         history
     ),
@@ -2171,7 +2172,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         cellLevel
     ),
@@ -2184,7 +2185,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         pointLevel
     ),
@@ -2197,7 +2198,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         dimensionedScalar
         (
@@ -2215,7 +2216,7 @@ Foam::hexRef8::hexRef8
             polyMesh::meshSubDir,
             mesh_,
             IOobject::NO_READ,
-            IOobject::AUTO_WRITE
+            IOobject::NO_WRITE
         ),
         List<refinementHistory::splitCell8>(0),
         labelList(0),
@@ -3075,7 +3076,7 @@ Foam::labelList Foam::hexRef8::consistentSlowRefinement2
     //            fMesh.time().timeName(),
     //            fMesh,
     //            IOobject::NO_READ,
-    //            IOobject::AUTO_WRITE,
+    //            IOobject::NO_WRITE,
     //            false
     //        ),
     //        fMesh,
diff --git a/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/refinementHistory.C b/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/refinementHistory.C
index 251257c112bcdcebbd9ebaf08b746fa8b229e98a..28511092c67bcc326c266b721812ff334731555f 100644
--- a/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/refinementHistory.C
+++ b/src/dynamicMesh/polyTopoChange/polyTopoChange/hexRef8/refinementHistory.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -335,7 +335,6 @@ void Foam::refinementHistory::freeSplitCell(const label index)
 }
 
 
-// Mark entry in splitCells. Recursively mark its parent and subs.
 void Foam::refinementHistory::markSplit
 (
     const label index,
@@ -372,7 +371,6 @@ void Foam::refinementHistory::markSplit
 }
 
 
-// Mark index and all its descendants
 void Foam::refinementHistory::mark
 (
     const label val,
@@ -762,7 +760,6 @@ Foam::refinementHistory::refinementHistory
 }
 
 
-// Construct as copy
 Foam::refinementHistory::refinementHistory
 (
     const IOobject& io,
@@ -783,7 +780,6 @@ Foam::refinementHistory::refinementHistory
 }
 
 
-// Construct from multiple
 Foam::refinementHistory::refinementHistory
 (
     const IOobject& io,
@@ -903,7 +899,6 @@ Foam::refinementHistory::refinementHistory
 }
 
 
-// Construct from Istream
 Foam::refinementHistory::refinementHistory(const IOobject& io, Istream& is)
 :
     regIOobject(io),
@@ -1180,7 +1175,6 @@ void Foam::refinementHistory::updateMesh(const mapPolyMesh& map)
 }
 
 
-// Update numbering for subsetting
 void Foam::refinementHistory::subset
 (
     const labelList& pointMap,
diff --git a/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C b/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C
index 4d3fb542092c13c105742dab906bb7062911b32b..b68576b352428e6bcbb9e97106af7e2ccfdf5100 100644
--- a/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C
+++ b/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -207,8 +207,6 @@ void Foam::meshRefinement::calcNeighbourData
 }
 
 
-// Find intersections of edges (given by their two endpoints) with surfaces.
-// Returns first intersection if there are more than one.
 void Foam::meshRefinement::updateIntersections(const labelList& changedFaces)
 {
     const pointField& cellCentres = mesh_.cellCentres();
@@ -609,8 +607,6 @@ void Foam::meshRefinement::setInstance(const fileName& inst)
 }
 
 
-// Remove cells. Put exposedFaces (output of getExposedFaces(cellsToRemove))
-// into exposedPatchIDs.
 Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::doRemoveCells
 (
     const labelList& cellsToRemove,
@@ -670,7 +666,6 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::doRemoveCells
 }
 
 
-// Split faces
 Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::splitFaces
 (
     const labelList& splitFaces,
@@ -684,7 +679,6 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::splitFaces
         label facei = splitFaces[i];
         const face& f = mesh_.faces()[facei];
 
-
         // Split as start and end index in face
         const labelPair& split = splits[i];
 
@@ -737,9 +731,12 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::splitFaces
         }
 
 
-Pout<< "face:" << facei << " verts:" << f
-    << " split into f0:" << f0
-    << " f1:" << f1 << endl;
+        if (debug)
+        {
+            Pout<< "face:" << facei << " verts:" << f
+                << " split into f0:" << f0
+                << " f1:" << f1 << endl;
+        }
 
         // Change/add faces
         meshMod.modifyFace
@@ -753,6 +750,7 @@ Pout<< "face:" << facei << " verts:" << f
             zoneI,                      // zone for face
             zoneFlip                    // face flip in zone
         );
+
         meshMod.addFace
         (
             f1,                         // modified face
@@ -1160,7 +1158,6 @@ Pout<< "face:" << facei << " verts:" << f
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-// Construct from components
 Foam::meshRefinement::meshRefinement
 (
     fvMesh& mesh,
@@ -1381,11 +1378,6 @@ Foam::autoPtr<Foam::mapDistributePolyMesh> Foam::meshRefinement::balance
 
     if (Pstream::parRun())
     {
-        //if (debug_)
-        //{
-        //    const_cast<Time&>(mesh_.time())++;
-        //}
-
         // Wanted distribution
         labelList distribution;
 
@@ -1648,7 +1640,6 @@ Foam::autoPtr<Foam::mapDistributePolyMesh> Foam::meshRefinement::balance
 }
 
 
-// Helper function to get intersected faces
 Foam::labelList Foam::meshRefinement::intersectedFaces() const
 {
     label nBoundaryFaces = 0;
@@ -1675,7 +1666,6 @@ Foam::labelList Foam::meshRefinement::intersectedFaces() const
 }
 
 
-// Helper function to get points used by faces
 Foam::labelList Foam::meshRefinement::intersectedPoints() const
 {
     const faceList& faces = mesh_.faces();
@@ -1788,7 +1778,6 @@ Foam::autoPtr<Foam::indirectPrimitivePatch> Foam::meshRefinement::makePatch
 }
 
 
-// Construct pointVectorField with correct boundary conditions
 Foam::tmp<Foam::pointVectorField> Foam::meshRefinement::makeDisplacementField
 (
     const pointMesh& pMesh,
@@ -2088,7 +2077,6 @@ Foam::label Foam::meshRefinement::appendPatch
 }
 
 
-// Adds patch if not yet there. Returns patchID.
 Foam::label Foam::meshRefinement::addPatch
 (
     fvMesh& mesh,
@@ -2451,7 +2439,6 @@ void Foam::meshRefinement::distribute(const mapDistributePolyMesh& map)
 }
 
 
-// Update local data for a mesh change
 void Foam::meshRefinement::updateMesh
 (
     const mapPolyMesh& map,