Help on "undebug"

[Zhenhai Duan <duan@cs.umn.edu>]

Originally I installed ns2, and runs well. I did something and recompiled
ns. But now I meet one problem: whenever I run ns, it seems it prints out
all tcl codes it used. It is strange for me, since I did not change any
option. 

There is another thing I want to ask. I noticed that one message mentioned
that there are something needed to be done in tcl code to let FQ work, Can
any body tell me what I should add in?

Thanks.
--Zhenhai