On the very off chance that another user of the InsightII molecular modelling program may be using Fedora Core 5, I am seeing breakage of this program under FC5 which didn't exist under FC4. Starting the program with... source /usr/accelrys/cshrc set_context I2005 insightII The program fails to start with errors of... uname: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory uname: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory /usr/accelrys/I2005/Linux_2_Intel_32/biosym_exe/splash: error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory Loading Insight II using OpenGL graphics ... /usr/accelrys/I2005/Linux_2_Intel_32/biosym_exe/insightII: error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory The same set of compatibility rpms (including the depreciated openmotif21) allows InsightII to run under Fedora Core 4 without problems. Unfortunately their launch scripts (which use the Flexm license server) are complex and difficult to follow. However I don't think it is the license server portion of their code because the Felix 2004 program from the same company (which uses the same license server software) runs fine. Does the errors above suggest a particular issue? Jack