Dear Developer: There is a bug on 1.4.0 Chan_iax2.c::try_firmware::1413 fwh = mmap(NULL, stbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0); if (!fwh) { ast_log(LOG_WARNING, "mmap failed: %s\n", strerror(errno)); close(fd); return -1; } if mmap fails it will return (-1) Regards, Andy