Hi, my first attempt went unanswered, reposting in the hope it'll bring more attention this time around: Huang-Vista-x86_32_intel toolset, which runs Intel 11.1 for Window, has this weird error on the serialization test for Boost.MultiIndex: Running 1 test case... ../libs/multi_index/test/test_serialization_template.hpp(82): error in "test_main_caller( argc, argv )": check all_indices_equal(m,m2) failed unknown location(0): fatal error in "test_main_caller( argc, argv )": std::exception: invalid signature (http://tinyurl.com/nd89x2 ) What I find weird is the throwing of invalid_signature, a Boost.Serialization exception that, according to docs, indicates that the beginning of a serialization file is not correct. I can't see how a problem with serializing multi_index_containers can lead to a file signature error. Any clue? Maybe the toolset maintainer can run this manually and provide more info? Thank you in advance, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo