diff --git a/src/OpenFOAM/containers/Lists/ListOps/ListOps.H b/src/OpenFOAM/containers/Lists/ListOps/ListOps.H
index c322c7856f..cbaf373a44 100644
--- a/src/OpenFOAM/containers/Lists/ListOps/ListOps.H
+++ b/src/OpenFOAM/containers/Lists/ListOps/ListOps.H
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2013 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -226,7 +226,7 @@ label findLower
 (
     const ListType&,
     typename ListType::const_reference,
-    const label stary,
+    const label start,
     const BinaryOp& bop
 );
 
@@ -263,6 +263,15 @@ public:
 };
 
 
+//- Helper class for list to append unique elelements of y onto the end of x
+template<class T>
+class ListUniqueEqOp
+{
+public:
+    void operator()(List<T>& x, const List<T>& y) const;
+};
+
+
 //- Reverse a list. First element becomes last element etc.
 template<class ListType>
 ListType reverseList(const ListType& list);
diff --git a/src/OpenFOAM/containers/Lists/ListOps/ListOpsTemplates.C b/src/OpenFOAM/containers/Lists/ListOps/ListOpsTemplates.C
index 29ea650551..7aabfd7964 100644
--- a/src/OpenFOAM/containers/Lists/ListOps/ListOpsTemplates.C
+++ b/src/OpenFOAM/containers/Lists/ListOps/ListOpsTemplates.C
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2013 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -742,6 +742,29 @@ void Foam::ListAppendEqOp<T>::operator()(List<T>& x, const List<T>& y) const
 }
 
 
+template<class T>
+void Foam::ListUniqueEqOp<T>::operator()(List<T>& x, const List<T>& y) const
+{
+    if (y.size())
+    {
+        if (x.size())
+        {
+            forAll(y, i)
+            {
+                if (findIndex(x, y[i]) == -1)
+                {
+                    x.append(y[i]);
+                }
+            }
+        }
+        else
+        {
+            x = y;
+        }
+    }
+}
+
+
 template<class ListType>
 ListType Foam::reverseList(const ListType& list)
 {
diff --git a/src/OpenFOAM/containers/Lists/UList/UListI.H b/src/OpenFOAM/containers/Lists/UList/UListI.H
index 815c9aafcd..ba72bc8871 100644
--- a/src/OpenFOAM/containers/Lists/UList/UListI.H
+++ b/src/OpenFOAM/containers/Lists/UList/UListI.H
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2014 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -101,7 +101,7 @@ inline void Foam::UList<T>::checkIndex(const label i) const
     if (!size_)
     {
         FatalErrorIn("UList<T>::checkIndex(const label)")
-            << "attempt to access element from zero sized list"
+            << "attempt to access element " << i << " from zero sized list"
             << abort(FatalError);
     }
     else if (i<0 || i>=size_)
diff --git a/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.C b/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.C
index cc54117f8b..0d1a2fe63f 100644
--- a/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.C
+++ b/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.C
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -43,6 +43,30 @@ Foam::UPtrList<T>::UPtrList(const label s)
 {}
 
 
+template<class T>
+Foam::UPtrList<T>::UPtrList(UList<T>& lst)
+:
+    ptrs_(lst.size())
+{
+    forAll(lst, i)
+    {
+        ptrs_[i] = &lst[i];
+    }
+}
+
+
+template<class T>
+Foam::UPtrList<T>::UPtrList(PtrList<T>& lst)
+:
+    ptrs_(lst.size())
+{
+    forAll(lst, i)
+    {
+        ptrs_[i] = &lst[i];
+    }
+}
+
+
 template<class T>
 Foam::UPtrList<T>::UPtrList(const Xfer<UPtrList<T> >& lst)
 {
diff --git a/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.H b/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.H
index cdf32f630a..4df5a82627 100644
--- a/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.H
+++ b/src/OpenFOAM/containers/Lists/UPtrList/UPtrList.H
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -42,6 +42,7 @@ SourceFiles
 #define UPtrList_H
 
 #include "List.H"
+#include "PtrList.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -109,6 +110,12 @@ public:
         //- Construct with size specified.
         explicit UPtrList(const label);
 
+        //- Construct from UList
+        explicit UPtrList(UList<T>&);
+
+        //- Construct from PtrList
+        explicit UPtrList(PtrList<T>&);
+
         //- Construct by transferring the parameter contents
         UPtrList(const Xfer<UPtrList<T> >&);
 
diff --git a/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.C b/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.C
index a7ada172d4..e723e6ad5e 100644
--- a/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.C
+++ b/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.C
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -58,6 +58,23 @@ void Foam::CompactIOList<T, BaseType>::readFromStream()
 }
 
 
+template<class T, class BaseType>
+bool Foam::CompactIOList<T, BaseType>::overflows() const
+{
+    label size = 0;
+    forAll(*this, i)
+    {
+        label oldSize = size;
+        size += this->operator[](i).size();
+        if (size < oldSize)
+        {
+            return true;
+        }
+    }
+    return false;
+}
+
+
 // * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * * //
 
 template<class T, class BaseType>
@@ -178,6 +195,29 @@ bool Foam::CompactIOList<T, BaseType>::writeObject
 
         return good;
     }
+    else if (overflows())
+    {
+        WarningIn
+        (
+            "CompactIOList<T, BaseType>::writeObject"
+            "(IOstream::streamFormat, IOstream::versionNumber"
+            ", IOstream::compressionType) const"
+        )   << "Overall number of elements of CompactIOList of size "
+            << this->size() << " overflows the representation of a label"
+            << endl << "    Switching to ascii writing" << endl;
+
+        // Change type to be non-compact format type
+        const word oldTypeName = typeName;
+
+        const_cast<word&>(typeName) = IOList<T>::typeName;
+
+        bool good = regIOobject::writeObject(IOstream::ASCII, ver, cmp);
+
+        // Change type back
+        const_cast<word&>(typeName) = oldTypeName;
+
+        return good;
+    }
     else
     {
         return regIOobject::writeObject(fmt, ver, cmp);
@@ -264,7 +304,22 @@ Foam::Ostream& Foam::operator<<
         start[0] = 0;
         for (label i = 1; i < start.size(); i++)
         {
-            start[i] = start[i-1]+L[i-1].size();
+            label prev = start[i-1];
+            start[i] = prev+L[i-1].size();
+
+            if (start[i] < prev)
+            {
+                FatalIOErrorIn
+                (
+                    "operator<<"
+                    "(Ostream& os, const CompactIOList<T, BaseType>&)",
+                    os
+                )   << "Overall number of elements " << start[i]
+                    << " of CompactIOList of size "
+                    << L.size() << " overflows the representation of a label"
+                    << endl << "Please recompile with a larger representation"
+                    << " for label" << exit(FatalIOError);
+            }
         }
 
         List<BaseType> elems(start[start.size()-1]);
diff --git a/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.H b/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.H
index dc06092c59..fafcdef52f 100644
--- a/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.H
+++ b/src/OpenFOAM/db/IOobjects/CompactIOList/CompactIOList.H
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -79,6 +79,9 @@ class CompactIOList
         //- Read according to header type
         void readFromStream();
 
+        //- Has too many elements in it?
+        bool overflows() const;
+
 public:
 
     //- Runtime type information
diff --git a/src/parallel/decompose/decompositionMethods/decompositionMethod/minData.H b/src/meshTools/regionSplit/minData.H
similarity index 100%
rename from src/parallel/decompose/decompositionMethods/decompositionMethod/minData.H
rename to src/meshTools/regionSplit/minData.H
diff --git a/src/parallel/decompose/decompositionMethods/decompositionMethod/minDataI.H b/src/meshTools/regionSplit/minDataI.H
similarity index 100%
rename from src/parallel/decompose/decompositionMethods/decompositionMethod/minDataI.H
rename to src/meshTools/regionSplit/minDataI.H