mini-c example does not compile (msvc2015, win32, boost 1.63)

Hello, 

compiling the qi mini_c example I get the error:

c:\_lib\boost\boost\phoenix\function\detail\cpp03\preprocessed\function_operator_10.hpp(57): 

error C2664: 
'boost::phoenix::actor<boost::proto::exprns_::basic_expr<Tag,Args,4>> 
                boost::phoenix::expr_ext<boost::phoenix::actor,Tag,H,char 
*,boost::phoenix::actor<boost::spirit::argument<3>>
 ,boost::phoenix::actor<boost::spirit::argument<2>>>::make(const 
client::error_handler<Iterator> &
                ,char *const ,const 
boost::phoenix::actor<boost::spirit::argument<3>> &
                ,const boost::phoenix::actor<boost::spirit::argument<2>> 
&)'
: cannot convert argument 2 from 'const char [18]' to 'char *const '

Origin of this error are the error handling lines. Here the one from 
expression_def.hpp

///////////////////////////////////////////////////////////////////////
// Error handling: on error in expr, call error_handler.
        on_error<fail>(expr,
            error_handler_function(error_handler)(
                "Error! Expecting ", _4, _3));

Any help to have that fixed would be highly appreciated. 
I implemented error_handling in several parser copying from mini_c.

Those do not compile any longer, too.

Regards, Frank

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