C1817: Parameter cannot be converted to non-constant reference

[ERROR]

Description

A constant argument was specified for calling a function with a reference parameter to a non-constant.

Example

  void f(const int &amp;);  // ok

  void f(int &amp;); // causes error, when calling

                 // with constant argument

  void main() {

    f(3);    // error for second function declaration

Tips

The parameter must be a reference to a constant, or pass a non-constant variable as argument.