Tom, I checked our glibc version on the machine I compiled the Linux executables: % rpm -q -a | grep glibc motif-2.1.10-3glibc21 glibc-2.1.92-14 compat-glibc-6.2-2.1.3.2 glibc-devel-2.1.92-14 glibc-profile-2.1.92-14 motif-devel-2.1.10-3glibc21 This seems to indicate that my binaries were compiled with version 2.1.92. Can you provide us with information on the error message you obtained, the program that emitted it, and iny otherinformation on what rpm packages you have installed? Thanks, Steve Chiswell