Dear Jalali, Download compat libstdc++ 33 library for FC and install... this will provide 32bit extensions library (libstdc++.so.5) required for 64bit C++ compilers. C. B. Basak -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://zeus.theochem.tuwien.ac.at/pipermail/wien/attachments/20100928/e66a5ae1/attachment.htm>