I have a class using boost interprocess. some of the code used in it are here http://stackoverflow.com/questions/8653207/boost-interprocess-vector-creatin... and here http://stackoverflow.com/questions/8517115/inserting-a-boost-vector-inside-a... when i use g++ -c and compile it, it compiles. I have another big project with whom i would like to use this class. so i added it to that project, and made changes to accomodate the new class and use it. But when i compile it, it crashes with a really big error and i have no clue what the hell is going on. Please help. I have attached a sample output from make. One more thing. Inside the project. the class compiles fine. the attached message comes in when compiling another file that has the header file of this class attached to it. stats.hpp -> this is the header to the class that uses boost manager.hpp -> this has stats.hpp included filter.cpp -> this has manager.hpp included. -- Prasanth Madhavan