Hi all, I reported a few days ago some problems I had using gdb 4.18 (under RH6.1) with NS. Well I figured them out and I had made a pretty silly mistake. You have to set CCOPT = -g in the Makefile to enable debbuging with gdb; but you also have to \rm all the .o files before making if you want to be able to run gdb nicely with NS. Cheers, Tarik