We recommend using Visual Studio 2017

Compiler Error C3668


The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at Compiler Error C3668.

method' : method with override specifier 'override' did not override any base class methods

A function attempted to override a non-existent function.

For more information, see Explicit Overrides.

The following sample generates C3668.

// C3668.cpp  
// compile with: /c  
__interface I {  
   void f(int);   // virtual by default  
class J {  
   void g(int);  
   virtual void h(int);  
struct R : I,J {  
   virtual void f() override {}   // C3668  
   virtual void f(int) override {}   // OK  
   virtual void g(int) override {}   // C3668  
   virtual void h(int) override {}   // OK