diff --git a/src/OpenFOAM/db/IOobject/IOobject.H b/src/OpenFOAM/db/IOobject/IOobject.H
index 5046b21555..ff1e8b6296 100644
--- a/src/OpenFOAM/db/IOobject/IOobject.H
+++ b/src/OpenFOAM/db/IOobject/IOobject.H
@@ -155,7 +155,7 @@ protected:
     // Protected member functions
 
         //- Construct and return an IFstream for the object.
-        //  The results is NULL if the stream constuction failed
+        //  The results is NULL if the stream construction failed
         Istream* objectStream();
 
         //- Set the object state to bad
diff --git a/src/OpenFOAM/db/IOobjects/IOField/IOField.C b/src/OpenFOAM/db/IOobjects/IOField/IOField.C
index 85ccd83d0e..973f7de1c1 100644
--- a/src/OpenFOAM/db/IOobjects/IOField/IOField.C
+++ b/src/OpenFOAM/db/IOobjects/IOField/IOField.C
@@ -29,41 +29,15 @@ License
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 template<class Type>
-Foam::IOField<Type>::IOField
-(
-    const IOobject& io
-)
+Foam::IOField<Type>::IOField(const IOobject& io)
 :
-    regIOobject(io),
-    Field<Type>(readStream(typeName))
+    regIOobject(io)
 {
-    close();
-}
-
-
-template<class Type>
-Foam::IOField<Type>::IOField
-(
-    const IOobject& io,
-    const label size
-)
-:
-    regIOobject(io),
-    Field<Type>(size)
-{}
-
-
-template<class Type>
-Foam::IOField<Type>::IOField
-(
-    const IOobject& io,
-    const Field<Type>& f
-)
-:
-    regIOobject(io),
-    Field<Type>(f)
-{
-    if (io.readOpt() == IOobject::READ_IF_PRESENT && headerOk())
+    if
+    (
+        io.readOpt() == IOobject::MUST_READ
+     || (io.readOpt() == IOobject::READ_IF_PRESENT && headerOk())
+    )
     {
         readStream(typeName) >> *this;
         close();
@@ -71,11 +45,77 @@ Foam::IOField<Type>::IOField
 }
 
 
+template<class Type>
+Foam::IOField<Type>::IOField(const IOobject& io, const label size)
+:
+    regIOobject(io)
+{
+    if
+    (
+        io.readOpt() == IOobject::MUST_READ
+     || (io.readOpt() == IOobject::READ_IF_PRESENT && headerOk())
+    )
+    {
+        readStream(typeName) >> *this;
+        close();
+    }
+    else
+    {
+        Field<Type>::setSize(size);
+    }
+}
+
+
+template<class Type>
+Foam::IOField<Type>::IOField(const IOobject& io, const Field<Type>& f)
+:
+    regIOobject(io)
+{
+    if
+    (
+        io.readOpt() == IOobject::MUST_READ
+     || (io.readOpt() == IOobject::READ_IF_PRESENT && headerOk())
+    )
+    {
+        readStream(typeName) >> *this;
+        close();
+    }
+    else
+    {
+        Field<Type>::operator=(f);
+    }
+}
+
+
 // * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * * //
 
-template<class T>
-Foam::IOField<T>::~IOField()
+template<class Type>
+Foam::IOField<Type>::~IOField()
 {}
 
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class Type>
+bool Foam::IOField<Type>::writeData(Ostream& os) const
+{
+    return (os << static_cast<const Field<Type>&>(*this)).good();
+}
+
+
+// * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
+
+template<class Type>
+void Foam::IOField<Type>::operator=(const IOField<Type>& rhs)
+{
+    Field<Type>::operator=(rhs);
+}
+
+
+template<class Type>
+void Foam::IOField<Type>::operator=(const Field<Type>& rhs)
+{
+    Field<Type>::operator=(rhs);
+}
+
 
 // ************************************************************************* //
diff --git a/src/OpenFOAM/db/IOobjects/IOField/IOField.H b/src/OpenFOAM/db/IOobjects/IOField/IOField.H
index 3da97e2009..e42cca65db 100644
--- a/src/OpenFOAM/db/IOobjects/IOField/IOField.H
+++ b/src/OpenFOAM/db/IOobjects/IOField/IOField.H
@@ -63,24 +63,13 @@ public:
     // Constructors
 
         //- Construct from IOobject
-        IOField
-        (
-            const IOobject&
-        );
+        IOField(const IOobject&);
 
         //- Construct from components
-        IOField
-        (
-            const IOobject&,
-            const Field<Type>&
-        );
+        IOField(const IOobject&, const Field<Type>&);
 
         //- Construct from IOobject and size (does not set values)
-        IOField
-        (
-            const IOobject&,
-            const label size
-        );
+        IOField(const IOobject&, const label size);
 
 
     // Destructor
@@ -90,23 +79,14 @@ public:
 
     // Member functions
 
-        bool writeData(Ostream& os) const
-        {
-            return (os << static_cast<const Field<Type>&>(*this)).good();
-        }
+        bool writeData(Ostream&) const;
 
 
     // Member operators
 
-        void operator=(const IOField<Type>& iof)
-        {
-            Field<Type>::operator=(iof);
-        }
+        void operator=(const IOField<Type>&);
 
-        void operator=(const Field<Type>& f)
-        {
-            Field<Type>::operator=(f);
-        }
+        void operator=(const Field<Type>&);
 };
 
 
diff --git a/src/OpenFOAM/db/IOobjects/IOList/IOList.C b/src/OpenFOAM/db/IOobjects/IOList/IOList.C
index 5c55da8399..11a80cbb2c 100644
--- a/src/OpenFOAM/db/IOobjects/IOList/IOList.C
+++ b/src/OpenFOAM/db/IOobjects/IOList/IOList.C
@@ -84,7 +84,6 @@ Foam::IOList<T>::IOList(const IOobject& io, const List<T>& list)
     {
         List<T>::operator=(list);
     }
-
 }
 
 
@@ -95,6 +94,16 @@ Foam::IOList<T>::~IOList()
 {}
 
 
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class T>
+bool Foam::IOList<T>::writeData(Ostream& os) const
+{
+    return (os << *this).good();
+}
+
+
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 
 template<class T>
@@ -111,11 +120,4 @@ void Foam::IOList<T>::operator=(const List<T>& rhs)
 }
 
 
-template<class T>
-bool Foam::IOList<T>::writeData(Ostream& os) const
-{
-    return (os << *this).good();
-}
-
-
 // ************************************************************************* //
diff --git a/src/OpenFOAM/db/IOobjects/IOMap/IOMap.C b/src/OpenFOAM/db/IOobjects/IOMap/IOMap.C
index 62a9523a5b..dffbda46d6 100644
--- a/src/OpenFOAM/db/IOobjects/IOMap/IOMap.C
+++ b/src/OpenFOAM/db/IOobjects/IOMap/IOMap.C
@@ -31,8 +31,7 @@ License
 template<class T>
 Foam::IOMap<T>::IOMap(const IOobject& io)
 :
-    regIOobject(io),
-    Map<T>()
+    regIOobject(io)
 {
     if
     (
diff --git a/src/OpenFOAM/db/IOobjects/IOPtrList/IOPtrList.C b/src/OpenFOAM/db/IOobjects/IOPtrList/IOPtrList.C
index d42634dae6..e6fae97c27 100644
--- a/src/OpenFOAM/db/IOobjects/IOPtrList/IOPtrList.C
+++ b/src/OpenFOAM/db/IOobjects/IOPtrList/IOPtrList.C
@@ -91,14 +91,7 @@ Foam::IOPtrList<T>::~IOPtrList()
 {}
 
 
-// * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
-
-template<class T>
-void Foam::IOPtrList<T>::operator=(const IOPtrList<T>& rhs)
-{
-    PtrList<T>::operator=(rhs);
-}
-
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 template<class T>
 bool Foam::IOPtrList<T>::writeData(Ostream& os) const
@@ -107,4 +100,12 @@ bool Foam::IOPtrList<T>::writeData(Ostream& os) const
 }
 
 
+// * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
+
+template<class T>
+void Foam::IOPtrList<T>::operator=(const IOPtrList<T>& rhs)
+{
+    PtrList<T>::operator=(rhs);
+}
+
 // ************************************************************************* //
diff --git a/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionary.C b/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionary.C
index 221496165a..33ff91412c 100644
--- a/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionary.C
+++ b/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionary.C
@@ -42,15 +42,10 @@ namespace Foam
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-Foam::IOdictionary::IOdictionary
-(
-    const IOobject& io
-)
+Foam::IOdictionary::IOdictionary(const IOobject& io)
 :
     regIOobject(io)
 {
-    dictionary::name() = IOobject::objectPath();
-
     if
     (
         io.readOpt() == IOobject::MUST_READ
@@ -60,18 +55,29 @@ Foam::IOdictionary::IOdictionary
         readStream(typeName) >> *this;
         close();
     }
+
+    dictionary::name() = IOobject::objectPath();
 }
 
 
-Foam::IOdictionary::IOdictionary
-(
-    const IOobject& io,
-    const dictionary& dict
-)
+Foam::IOdictionary::IOdictionary(const IOobject& io, const dictionary& dict)
 :
-    regIOobject(io),
-    dictionary(dict)
+    regIOobject(io)
 {
+    if
+    (
+        io.readOpt() == IOobject::MUST_READ
+     || (io.readOpt() == IOobject::READ_IF_PRESENT && headerOk())
+    )
+    {
+        readStream(typeName) >> *this;
+        close();
+    }
+    else
+    {
+        dictionary::operator=(dict);
+    }
+
     dictionary::name() = IOobject::objectPath();
 }
 
@@ -92,9 +98,9 @@ const Foam::word& Foam::IOdictionary::name() const
 
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 
-void Foam::IOdictionary::operator=(const IOdictionary& d)
+void Foam::IOdictionary::operator=(const IOdictionary& rhs)
 {
-    dictionary::operator=(d);
+    dictionary::operator=(rhs);
 }
 
 
diff --git a/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionaryIO.C b/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionaryIO.C
index 633ed3c7e9..2e861ac34c 100644
--- a/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionaryIO.C
+++ b/src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionaryIO.C
@@ -34,27 +34,17 @@ Description
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-namespace Foam
-{
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-bool IOdictionary::readData(Istream& is)
+bool Foam::IOdictionary::readData(Istream& is)
 {
     is >> *this;
     return !is.bad();
 }
 
 
-bool IOdictionary::writeData(Ostream& os) const
+bool Foam::IOdictionary::writeData(Ostream& os) const
 {
     dictionary::write(os, false);
     return os.good();
 }
 
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //