Anyone else agree this is a problem?<br><br>I was trying to compile this simple program:<br><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">#include <boost/numeric/ublas/vector_sparse.hpp></span><br style="font-family: courier new,monospace;"> <span style="font-family: courier new,monospace;">#include <boost/numeric/ublas/io.hpp></span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">#include <iostream></span><br style="font-family: courier new,monospace;"> <br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">int main(int argc, char** argv)</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">{</span><br style="font-family: courier new,monospace;"> <span style="font-family: courier new,monospace;"> using namespace boost::numeric::ublas;</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> mapped_vector<double> v(3,3);</span><br style="font-family: courier new,monospace;"> <span style="font-family: courier new,monospace;"> for ( unsigned i = 0; i < v.size(); ++i )</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> v(i) = i;</span><br style="font-family: courier new,monospace;"> <br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;"> std::cout << v << std::endl;</span><br style="font-family: courier new,monospace;"><br style="font-family: courier new,monospace;"> <span style="font-family: courier new,monospace;"> return 0;</span><br style="font-family: courier new,monospace;"><span style="font-family: courier new,monospace;">}</span><br><br>and the include hierarchy ends up including <span style="font-family: courier new,monospace;">serialization/utility.hpp</span>. This file uses the template <span style="font-family: courier new,monospace;">mpl::and_</span>, so I think it should include <span style="font-family: courier new,monospace;">xpressive/xpressive.hpp</span>.<br> <br>Sancho<br>