Is there some online reference for gdb? I consulted a Linux programming book but it did not help. I tried the command 'gdb licq core' but this got me nowhere; no 'core' file is created. I have used gdb before but for some reason, I cannot get it to work. Perhaps I have forgotten how to do this. thanks -- Andrew ----------------------------- GnuPG Public KeyID: 0x48109681 *we all live downstream*