[ns] NS2 debugger

[qweq adcsad]

Hello,
      I am trying to debug NS2 with DDD. I compiled it with -g flag, but still it can not load the source code. It says "/home/..../ns2.33/<<C++-namespaces:no such file or directory>>" .

I am using Ubuntu 9.04 and the compiler is gcc-4.3 .Even when I use gdb in command prompt and put " list"  command it gives the above message.Could anybody help me in this matter?


regards,
Nill