Thanks to all who have written me about problems with mbuff and C++. I have released 2 versions which should hopefully fix it. http://crds.chemie.unibas.ch/PCI-MIO-E/mbuff-0.6.6.tar.gz (stable) http://crds.chemie.unibas.ch/PCI-MIO-E/mbuff-0.7.1.tar.gz (experimental) As for usage count: yes, mbuff_alloc increases it by 3. See FAQ. -- Tomek