warning C4819: How to find the character that has to be saved in unicode?

Question

I have seen the following warning recently through my VS2010.

Warning 21 warning C4819: The file contains a character that cannot be represented in the current code pag

Answer 1

at line 176:

BOOST_ASSERT(0); // §27.4.3.2 allows undefined-behaviour here

You see, there is a character before 27 in the above line.