diff --git a/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H b/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H
index 42633d1d7d..907a655e29 100644
--- a/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H
+++ b/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
-     \\/     M anipulation  |
+     \\/     M anipulation  | Copyright (C) 2017 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -127,6 +127,12 @@ public:
         //- Copy constructor
         CSV(const CSV<Type>& tbl);
 
+        //- Construct and return a clone
+        virtual tmp<Function1<Type>> clone() const
+        {
+            return tmp<Function1<Type>>(new CSV<Type>(*this));
+        }
+
 
     //- Destructor
     virtual ~CSV();
diff --git a/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.C b/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.C
index bd4098d7f9..e5aedbd501 100644
--- a/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.C
+++ b/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.C
@@ -72,6 +72,17 @@ Type Foam::Function1<Type>::value(const scalar x) const
     return Zero;
 }
 
+template<class Type>
+Foam::tmp<Foam::Field<Type>> Foam::Function1<Type>::value
+(
+    const scalarField& x
+) const
+{
+    NotImplemented;
+
+    return tmp<Foam::Field<Type>>(nullptr);
+}
+
 
 template<class Type>
 Type Foam::Function1<Type>::integrate(const scalar x1, const scalar x2) const
@@ -82,6 +93,19 @@ Type Foam::Function1<Type>::integrate(const scalar x1, const scalar x2) const
 }
 
 
+template<class Type>
+Foam::tmp<Foam::Field<Type>> Foam::Function1<Type>::integrate
+(
+    const scalarField& x1,
+    const scalarField& x2
+) const
+{
+    NotImplemented;
+
+    return tmp<Foam::Field<Type>>(nullptr);
+}
+
+
 template<class Function1Type>
 Foam::tmp<Foam::Field<typename Function1Type::returnType>>
 Foam::FieldFunction1<Function1Type>::value
diff --git a/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H b/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H
index 8b31dc953d..ed18ad041f 100644
--- a/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H
+++ b/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H
@@ -142,7 +142,7 @@ public:
             virtual Type value(const scalar x) const;
 
             //- Return value as a function of (scalar) independent variable
-            virtual tmp<Field<Type>> value(const scalarField& x) const = 0;
+            virtual tmp<Field<Type>> value(const scalarField& x) const;
 
             //- Integrate between two (scalar) values
             virtual Type integrate(const scalar x1, const scalar x2) const;
@@ -152,7 +152,7 @@ public:
             (
                 const scalarField& x1,
                 const scalarField& x2
-            ) const = 0;
+            ) const;
 
 
         // I/O