Hi, I'm having linking errors(multiple definitions) with the ptr_map in VC7.1. The problem is in the struct eraser(all its methods) inside the function insert_lookup in the ptr_map_adapter_base template. I've tried inlining all the methods with no success. The workaround I found was making eraser a inner class inside the ptr_map_adapter_base template(moved it from the insert_lookup function). This errors appear when using the operator[] of the very same ptr_map in two different files. I attached the simplest files that I could make that shows these problems... Thank you for boost, Felipe Magno de Almeida. -- Felipe Magno de Almeida Developer from synergy and Computer Science student from State University of Campinas(UNICAMP). Unicamp: http://www.ic.unicamp.br Synergy: http://www.synergy.com.br "There is no dark side of the moon really. Matter of fact it's all dark."