I use last release: geant4.6.0. I have redhat9.0, gcc 3.2.2 20030222 (Linux 3.2.2.-5). Compilation of geant was o.k., without errors, the compilation exmaples/novice is also o.k., but if I try to exec e.g. exampleN03 I have segmanetation fault message. I made compilation with G4DEBUG option and using gdb I have: gdb) exec-file exampleN01 (gdb) run Starting program: /data1/geant4.6.0/bin/Linux-g++/exampleN01 Program received signal SIGSEGV, Segmentation fault. 0x42790675 in _int_malloc () from /lib/tls/libc.so.6 (gdb) list 1 /usr/src/build/237294-i386/BUILD/glibc-2.3.2-200304020432/build-i386-linux/csu/crti.S: No such file or directory. in /usr/src/build/237294-i386/BUILD/glibc-2.3.2-200304020432/build-i386-linux/csu/crti.S (gdb) The same error I did obtain if I try e.g. N01, N02,...example... Dusan