Dear all, I have installed the ns-2.1b6 from the pieces and also nam, all versions of January 19. When I try the examples, any examples, I get the message You are using the tracefile format older than 1.0a5 which will not allow you to run namgraph nam: badly formatted event at offset 38 in /myhome/work/out.tr nam: `+ 1 0 2 cbr 210 ------- 0 0.0 3.1 0 0' does anybody know what the problem is?? thanks A.Leventi-Peetz