Hello! Using numeric_cast I face a warning in MSVC 8.0 Express Edition e:\libraries\boost\include\boost-1_35\boost\numeric\conversion\cast.hpp(41) : warning C4267: 'return' : conversion from 'size_t' to 'Uint32', possible loss of data e:\projects\fundamental_type_factory.cpp(62) : see reference to function template instantiation 'Target boost::numeric_cast<T,msgcat::fundamental_type::numeric_result>(Source)' being compiled with [ Target=Uint32, T=Uint32, Source=fundamental_type::numeric_result ] e:\projects\fundamental_type_factory.cpp(61) : while compiling class template member function 'fundamental_type &`anonymous-namespace'::fundamental_type_impl<T>::operator =(const fundamental_type::numeric_result &)' .... Trying to compile without warnings I am wondering about this warning, since I use the cast to raise an exception at runtime if data are lost. Is it logical? With Kind Regards, Ovanes