>What are the elements in matrixBegin? If an example helps, you might try looking at lines 97-125 of https://projects.coin-or.org/CoinUtils/browser/trunk/CoinUtils/test/CoinPackedMatrixTest.cpp JP -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://list.coin-or.org/pipermail/clp/attachments/20090324/a4a5684d/attachment.html>