In article <20020930.024602.71082195.kondou@isc.org>, Katsuhiro Kondou <Katsuhiro_Kondou@isc.org> wrote; } I've got the core, but not investigated yet. I'll } do it tomorrow, hopefully. It looks like allocating zero sized memory is failed. (gdb) bt #0 0xff141750 in _malloc_unlocked () from /usr/lib/libc.so.1 #1 0xff141520 in malloc () from /usr/lib/libc.so.1 #2 0x21cb4 in xalloc () #3 0x21e04 in ol_string_alloc () #4 0x1ee28 in c_format () #5 0x1aebc in do_handle_dest_writer (c=0x57dd8, msg=0x3f448) at affile.c:321 #6 0x1bac8 in do_handle_affile_log (c=0x57dd8, msg=0x3f448) at affile.c:982 #7 0x1713c in do_handle_log (c=0x42690, msg=0x3f448) at destinations.c:103 #8 0x16578 in do_distribute_log (c=0x50728, msg=0x3f448) at center.c:149 #9 0x16164 in do_add_source_name (c=0x40de8, logmsg=0x3f448) at sources.c:272 #10 0x1c76c in do_handle_afinet_line (c=0x3f3d0, msg=0x3f448) at afinet.c:113 #11 0x15bd8 in do_handle_line (self=0x3f410, length=259024, data=0x3f448 "", addr=0x3f448, addrlen=0) at sources.c:72 #12 0x15d48 in do_read_line (h=0x5c57e, read=0xffbef9c8) at sources.c:138 #13 0x1ff54 in read_callback () #14 0x1fbcc in io_iter () #15 0x152d8 in main_loop (backend=0x39748) at main.c:192 #16 0x159c8 in main (argc=0, argv=0xffbefd14) at main.c:516 (gdb) frame 2 #2 0x21cb4 in xalloc () (gdb) print length $4 = 0 (gdb) frame 3 #3 0x21e04 in ol_string_alloc () (gdb) print length $5 = 0 (gdb) frame 4 #4 0x1ee28 in c_format () (gdb) print length $6 = 0 -- Katsuhiro Kondou