Hi, I guess this is a 'newbie' question, so I apologize if the answer is obvious to everyone but me. I've just installed boost 1.31 on an apple powerpc using fink. However, when I run compile for the dependent software that needs the boost libraries, I get the following: checking for boost/numeric/ublas/matrix.hpp presence in /sw/include...... yes checking for boost/numeric/ublas/matrix.hpp usability...... no Is there something I can do to matrix.hpp to make it usable? I've confirmed that it exists in the right place, and isn't empty or anything. Thanks, Becky ------------------------------------------------------------------------ ---------------------- Rebecca Bendick, Ph.D. Bullard Laboratories University of Cambridge Madingley Road CAMBRIDGE CB3 0EZ United Kingdom bendick@esc.cam.ac.uk