diff --git a/meshLibrary/utilities/containers/DynList/DynList.C b/meshLibrary/utilities/containers/DynList/DynList.C
index 2bf3a2a47721d4c00e563d9bae97a2954668165e..2e2350e14e88dce8e99024c3d54436f39f9cd7b5 100644
--- a/meshLibrary/utilities/containers/DynList/DynList.C
+++ b/meshLibrary/utilities/containers/DynList/DynList.C
@@ -29,9 +29,11 @@ License
 
 // Construct from Istream
 template<class T, Foam::label staticSize>
-Foam::DynList<T, staticSize>::DynList(Istream& is)
+Foam::DynList<T, staticSize>::DynList(Istream&)
 :
-    UList<T>(),
+    dataPtr_(NULL),
+    nAllocated_(0),
+    staticData_(),
     nextFree_(0)
 {
     FatalErrorIn
@@ -39,11 +41,6 @@ Foam::DynList<T, staticSize>::DynList(Istream& is)
         "template<class T, Foam::label staticSize>"
         "\nFoam::DynList<T, staticSize>::DynList(Istream& is)"
     ) << "Not implemented" << exit(FatalError);
-    
-    List<T> helper(is);
-    
-    nextFree_ = helper.size();
-    UList<T>::swap(helper);
 }
 
 
@@ -54,7 +51,7 @@ Foam::Ostream& Foam::operator<<
     const Foam::DynList<T, staticSize>& DL
 )
 {
-    UList<T> helper(const_cast<T*>(DL.begin()), DL.nextFree_);
+    UList<T> helper(DL.dataPtr_, DL.nextFree_);
     os << helper;
 
     return os;
@@ -74,9 +71,11 @@ Foam::Istream& Foam::operator>>
         "\nFoam::Istream& Foam::operator>>"
         "(Foam::Istream& is, Foam::DynList<T, staticSize>& DL)"
     ) << "Not implemented" << exit(FatalError);
-    
-    is >> static_cast<List<T>&>(DL);
-    DL.nextFree_ = DL.List<T>::size();
+
+    UList<T> helper(DL.dataPtr_, DL.nextFree_);
+    //is >> static_cast<List<T>&>(DL);
+    is >> helper;
+    DL.nextFree_ = helper.size();
 
     return is;
 }
diff --git a/meshLibrary/utilities/containers/DynList/DynList.H b/meshLibrary/utilities/containers/DynList/DynList.H
index 1b550836b83f1ef36956c1eb601cb9732fbad098..8cf6d46afa574089c6dd67bec53061b38c1b5614 100644
--- a/meshLibrary/utilities/containers/DynList/DynList.H
+++ b/meshLibrary/utilities/containers/DynList/DynList.H
@@ -73,10 +73,14 @@ Istream& operator>>
 
 template<class T, label staticSize = 16>
 class DynList
-:
-    public UList<T>
 {
     // Private data
+        //- pointer to the data
+        T* dataPtr_;
+
+        //- size of the allocated data
+        label nAllocated_;
+
         //- statically allocated data (used for short lists)
         T staticData_[staticSize];
 
@@ -84,12 +88,21 @@ class DynList
         label nextFree_;
 
     // Private member functions
+        //- access to the data pointer
+        inline T* data();
+
+        //- const access to the data pointer
+        inline const T* data() const;
+
         //- allocate list size
         inline void allocateSize(const label);
 
         //- check if index is inside the scope (used for debugging only)
         inline void checkIndex(const label) const;
 
+        //- check if nAllocated_ is greater or equal to nextFree_
+        inline void checkAllocation() const;
+
 public:
 
     // Constructors
@@ -205,6 +218,10 @@ public:
         template<class ListType>
         inline void operator=(const ListType&);
 
+        //- Compare the list with the another one
+        inline bool operator==(const DynList<T, staticSize>&) const;
+        inline bool operator!=(const DynList<T, staticSize>&) const;
+
 
     // IOstream operators
 
diff --git a/meshLibrary/utilities/containers/DynList/DynListI.H b/meshLibrary/utilities/containers/DynList/DynListI.H
index 5e1e2ae9f2fa35ed5e577b97a12d225ae897448d..3f9e25127aab1ae0938b7cbde125992fd13fa23d 100644
--- a/meshLibrary/utilities/containers/DynList/DynListI.H
+++ b/meshLibrary/utilities/containers/DynList/DynListI.H
@@ -23,48 +23,66 @@ License
 
 \*---------------------------------------------------------------------------*/
 
+template<class T, Foam::label staticSize>
+inline T* Foam::DynList<T, staticSize>::data()
+{
+    return dataPtr_;
+}
+
+template<class T, Foam::label staticSize>
+inline const T* Foam::DynList<T, staticSize>::data() const
+{
+    return dataPtr_;
+}
 
 template<class T, Foam::label staticSize>
 inline void Foam::DynList<T, staticSize>::allocateSize(const label s)
 {
-    if( s > UList<T>::size()  )
+    checkAllocation();
+
+    if( s > staticSize )
     {
-        T* newData = new T[s];
+        if( s > nAllocated_ )
+        {
+            //- allocates enough space for the elements
+            T* newData = new T[s];
 
-        for(label i=0;i<nextFree_;++i)
-            newData[i] = this->operator[](i);
+            for(label i=0;i<nextFree_;++i)
+                newData[i] = this->operator[](i);
 
-        T* data = UList<T>::begin();
-        if( data && (data != staticData_) )
-            delete [] data;
+            if( nAllocated_ > staticSize )
+                delete [] dataPtr_;
 
-        //UList<T>::reset(newData, s);
-        this->UList<T>::operator=(UList<T>(newData, s));
-    }
-    else if( (s > staticSize) && (s < UList<T>::size()) )
-    {
-        T* newData = new T[s];
+            dataPtr_ = newData;
+            nAllocated_ = s;
+        }
+        else if( s < nAllocated_ )
+        {
+            //- shrinks the list
+            T* newData = new T[s];
 
-        for(label i=0;i<s;++i)
-            newData[i] = this->operator[](i);
+            for(label i=0;i<s;++i)
+                newData[i] = this->operator[](i);
 
-        T* data = UList<T>::begin();
-        delete [] data;
+            delete [] dataPtr_;
 
-        //UList<T>::reset(newData, s);
-        this->UList<T>::operator=(UList<T>(newData, s));
+            dataPtr_ = newData;
+            nAllocated_ = s;
+        }
     }
-    else if( (s <= staticSize) && (UList<T>::size() > staticSize) )
+    else
     {
-        for(label i=0;i<s;++i)
-            staticData_[i] = UList<T>::operator[](i);
+        if( nAllocated_ > staticSize )
+        {
+            //- delete dynamically allocated data
+            for(label i=0;i<s;++i)
+                staticData_[i] = dataPtr_[i];
 
-        T* data = UList<T>::begin();
-        if( data && (data != staticData_) )
-            delete [] data;
+            delete [] dataPtr_;
+        }
 
-        //UList<T>::reset(staticData_, staticSize);
-        this->UList<T>::operator=(UList<T>(staticData_, staticSize));
+        dataPtr_ = staticData_;
+        nAllocated_ = staticSize;
     }
 }
 
@@ -82,60 +100,105 @@ inline void Foam::DynList<T, staticSize>::checkIndex(const label i) const
     }
 }
 
+template<class T, Foam::label staticSize>
+inline void Foam::DynList<T, staticSize>::checkAllocation() const
+{
+    if( nextFree_ > nAllocated_ )
+        FatalErrorIn
+        (
+            "template<class T, Foam::label staticSize> "
+            "inline void Foam::DynList<T, staticSize>::"
+            "checkAllocation() const"
+        ) << "nextFree_ is out of scope 0 " << " and " << nAllocated_
+          << abort(FatalError);
+}
+
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 //- Construct null
 template<class T, Foam::label staticSize>
 inline Foam::DynList<T, staticSize>::DynList()
 :
-    UList<T>(staticData_, staticSize),
+    dataPtr_(NULL),
+    nAllocated_(0),
+    staticData_(),
     nextFree_(0)
-{}
+{
+    setSize(0);
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+}
 
 
 template<class T, Foam::label staticSize>
 inline Foam::DynList<T, staticSize>::DynList(const label s)
 :
-    UList<T>(staticData_, staticSize),
+    dataPtr_(NULL),
+    nAllocated_(0),
+    staticData_(),
     nextFree_(0)
 {
     setSize(s);
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 template<class T, Foam::label staticSize>
 inline Foam::DynList<T, staticSize>::DynList(const label s, const T& val)
 :
-    UList<T>(staticData_, staticSize),
+    dataPtr_(NULL),
+    nAllocated_(0),
+    staticData_(),
     nextFree_(0)
 {
     setSize(s);
 
     for(label i=0;i<s;++i)
         this->operator[](i) = val;
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 template<class T, Foam::label staticSize>
 inline Foam::DynList<T, staticSize>::DynList(const UList<T>& ul)
 :
-    UList<T>(staticData_, staticSize),
+    dataPtr_(NULL),
+    nAllocated_(0),
+    staticData_(),
     nextFree_(0)
 {
     setSize(ul.size());
 
     forAll(ul, i)
         this->operator[](i) = ul[i];
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 template<class T, Foam::label staticSize>
 template<class ListType>
 inline Foam::DynList<T, staticSize>::DynList(const ListType& l)
 :
-    UList<T>(staticData_, staticSize),
+    dataPtr_(NULL),
+    nAllocated_(0),
+    staticData_(),
     nextFree_(0)
 {
     setSize(l.size());
     for(label i=0;i<nextFree_;++i)
         this->operator[](i) = l[i];
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 //- Copy construct
@@ -145,19 +208,24 @@ inline Foam::DynList<T, staticSize>::DynList
     const DynList<T, staticSize>& dl
 )
 :
-    UList<T>(staticData_, staticSize),
+    dataPtr_(NULL),
+    nAllocated_(0),
+    staticData_(),
     nextFree_(0)
 {
     setSize(dl.size());
     for(label i=0;i<nextFree_;++i)
         this->operator[](i) = dl[i];
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 template<class T, Foam::label staticSize>
 inline Foam::DynList<T, staticSize>::~DynList()
 {
     allocateSize(0);
-    //UList<T>::reset(NULL, 0);
 }
 
 
@@ -166,12 +234,20 @@ inline Foam::DynList<T, staticSize>::~DynList()
 template<class T, Foam::label staticSize>
 inline Foam::label Foam::DynList<T, staticSize>::size() const
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     return nextFree_;
 }
 
 template<class T, Foam::label staticSize>
 inline Foam::label Foam::DynList<T, staticSize>::byteSize() const
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     if( !contiguous<T>() )
     {
         FatalErrorIn("DynList<T>::byteSize()")
@@ -181,20 +257,31 @@ inline Foam::label Foam::DynList<T, staticSize>::byteSize() const
     }
 
     return nextFree_*sizeof(T);
-
 }
 
 template<class T, Foam::label staticSize>
 inline void Foam::DynList<T, staticSize>::setSize(const label s)
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     allocateSize(s);
     nextFree_ = s;
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 
 template<class T, Foam::label staticSize>
 inline void Foam::DynList<T, staticSize>::clear()
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     nextFree_ = 0;
 }
 
@@ -202,34 +289,62 @@ inline void Foam::DynList<T, staticSize>::clear()
 template<class T, Foam::label staticSize>
 void Foam::DynList<T, staticSize>::shrink()
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     allocateSize(nextFree_);
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 template<class T, Foam::label staticSize>
 inline void Foam::DynList<T, staticSize>::append(const T& e)
 {
-    if( nextFree_ >= UList<T>::size() )
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
+    if( nextFree_ >= nAllocated_ )
     {
-        const label newSize = 2*UList<T>::size()+2;
+        const label newSize = 2*nAllocated_+2;
         allocateSize(newSize);
     }
 
-    UList<T>::operator[](nextFree_++) = e;
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
+    this->operator[](nextFree_++) = e;
 }
 
 template<class T, Foam::label staticSize>
 inline void Foam::DynList<T, staticSize>::appendIfNotIn(const T& e)
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     if( !contains(e) )
          append(e);
+
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
 }
 
 template<class T, Foam::label staticSize>
 inline bool Foam::DynList<T, staticSize>::contains(const T& e) const
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     for(label i=0;i<nextFree_;++i)
     {
-        if( UList<T>::operator[](i) == e )
+        if( this->operator[](i) == e )
             return true;
     }
 
@@ -242,9 +357,13 @@ inline Foam::label Foam::DynList<T, staticSize>::containsAtPosition
     const T& e
 ) const
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     for(label i=0;i<nextFree_;++i)
     {
-        if( UList<T>::operator[](i) == e )
+        if( this->operator[](i) == e )
             return i;
     }
 
@@ -254,12 +373,20 @@ inline Foam::label Foam::DynList<T, staticSize>::containsAtPosition
 template<class T, Foam::label staticSize>
 inline const T& Foam::DynList<T, staticSize>::lastElement() const
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     return this->operator[](nextFree_-1);
 }
 
 template<class T, Foam::label staticSize>
 inline T Foam::DynList<T, staticSize>::removeLastElement()
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     if( nextFree_ == 0 )
     {
         FatalErrorIn
@@ -268,13 +395,18 @@ inline T Foam::DynList<T, staticSize>::removeLastElement()
         )   << "List is empty" << abort(FatalError);
     }
 
-    T el = UList<T>::operator[](--nextFree_);
+    T el = this->operator[](nextFree_-1);
+    --nextFree_;
     return el;
 }
 
 template<class T, Foam::label staticSize>
 inline T Foam::DynList<T, staticSize>::removeElement(const label i)
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     if( nextFree_ == 0 )
     {
         FatalErrorIn
@@ -287,12 +419,20 @@ inline T Foam::DynList<T, staticSize>::removeElement(const label i)
     this->operator[](i) = this->operator[](nextFree_-1);
     --nextFree_;
 
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     return el;
 }
 
 template<class T, Foam::label staticSize>
 inline T& Foam::DynList<T, staticSize>::newElmt(const label i)
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     return this->operator()(i);
 }
 
@@ -301,13 +441,21 @@ inline T& Foam::DynList<T, staticSize>::newElmt(const label i)
 template<class T, Foam::label staticSize>
 inline T& Foam::DynList<T, staticSize>::operator()(const label i)
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     nextFree_ = Foam::max(nextFree_, i + 1);
 
-    if( nextFree_ >= UList<T>::size() )
+    if( nextFree_ >= nAllocated_ )
     {
         allocateSize(2 * nextFree_+1);
     }
 
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     return this->operator[](i);
 }
 
@@ -315,20 +463,22 @@ template<class T, Foam::label staticSize>
 inline const T& Foam::DynList<T, staticSize>::operator[](const label i) const
 {
     # ifdef FULLDEBUG
+    checkAllocation();
     checkIndex(i);
     # endif
 
-    return UList<T>::operator[](i);
+    return dataPtr_[i];
 }
 
 template<class T, Foam::label staticSize>
 inline T& Foam::DynList<T, staticSize>::operator[](const label i)
 {
     # ifdef FULLDEBUG
+    checkAllocation();
     checkIndex(i);
     # endif
 
-    return UList<T>::operator[](i);
+    return dataPtr_[i];
 }
 
 template<class T, Foam::label staticSize>
@@ -374,7 +524,12 @@ inline const T& Foam::DynList<T, staticSize>::rcElement
 template<class T, Foam::label staticSize>
 inline void Foam::DynList<T, staticSize>::operator=(const T& t)
 {
-    UList<T>::operator=(t);
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
+    for(label i=0;i<nextFree_;++i)
+        operator[](i) = t;
 }
 
 template<class T, Foam::label staticSize>
@@ -383,9 +538,17 @@ inline void Foam::DynList<T, staticSize>::operator=
     const DynList<T, staticSize>& dl
 )
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     allocateSize(dl.size());
     nextFree_ = dl.size();
 
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     for(label i=0;i<nextFree_;++i)
         this->operator[](i) = dl[i];
 }
@@ -394,12 +557,45 @@ template<class T, Foam::label staticSize>
 template<class ListType>
 inline void Foam::DynList<T, staticSize>::operator=(const ListType& l)
 {
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     allocateSize(l.size());
     nextFree_ = l.size();
 
+    # ifdef DEBUG
+    checkAllocation();
+    # endif
+
     for(label i=0;i<nextFree_;++i)
         this->operator[](i) = l[i];
 }
 
+template<class T, Foam::label staticSize>
+inline bool Foam::DynList<T, staticSize>::operator==
+(
+    const DynList<T, staticSize>& DL
+) const
+{
+    if( nextFree_ != DL.nextFree_ )
+        return false;
+
+    forAll(DL, i)
+        if( this->operator[](i) != DL[i] )
+            return false;
+
+    return true;
+}
+
+template<class T, Foam::label staticSize>
+inline bool Foam::DynList<T, staticSize>::operator!=
+(
+    const DynList<T, staticSize>& DL
+) const
+{
+    return !operator==(DL);
+}
+
 
 // ************************************************************************* //