Hi Please will some one help me with what is probably a simple Linux error? I have installed Boost 1.40 on Centos 5.3 using an rpm from blackopsoft.com. When I run my executable I get: Failed to load the following library files: [snip] dlerror = libboost_python.so.2: cannot open shared object file: No such file or directory Executing: /sbin/ldconfig -p | grep boost gives: libboost_python-mt.so.1.40.0 (libc6,x86-64) => /usr/lib64/libboost_python-mt.so.1.40.0 libboost_python-mt.so (libc6,x86-64) => /usr/lib64/libboost_python-mt.so libboost_python-mt-d.so.1.40.0 (libc6,x86-64) => /usr/lib64/libboost_python-mt-d.so.1.40.0 libboost_python-mt-d.so (libc6,x86-64) => /usr/lib64/libboost_python-mt-d.so Please can anyone suggest what is wrong? Best regards David