The binaries, which is name="old_program", work well under the 10.2-RELEASE_amd64(BASE+KERNEL+LIB32+compat4x-i386). # brandelf ./old_program File './old_program' is of brand 'SVR4' (0) From then I update it to 10.3R by freebsd-updete, an error was occurred. # ./old_program ELF interpreter /usr/libexec/ld-elf.so.1 not found, error 8 Abort As a result of verifying the update of STABLE/10 from 10.2R to 10.3R, it was found that it can be repaired by removing r293499. cd /usr/src/ patch -p2 -R -i r293499.diff make buildkernel make installkernel reboot ( r293499.diff ) https://svnweb.freebsd.org/base/stable/10/sys/kern/imgact_elf.c?r1=293318&r2=293449 I've registered it to Bugzilla. https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211837 -- Kenji Osaka Japan