Compiler Error C2871
'name' : a namespace with this name does not exist
This error will occur when you pass an identifier that is not a namespace to a using directive.
Example
The following sample generates C2871:
// C2871.cpp
// compile with: /c
namespace a {
int fn(int i) { return i; }
}
namespace b {
using namespace d; // C2871 because d is not a namespace
using namespace a; // OK
}