[ns] Name Conflict?

[Will Shaver <will@digitalfountain.com>]

I've written a new multicast agent in ns, and things where going fine
for a while, but it seems like I'm getting these unpredictible
segmentation faults quite often. I believe that it may be some kind of
namespace conflict or error. It seems to occur when I call a function
that I've instantiated in TCL from within my c++ code. But the bug goes
away if I call the function 10 seconds into the simulation. Its as if it
takes the simulation a while to resolve the names, and once it has I can
use these functions. But if I try it early I get the wonderful and ever
helpful:
segmentation fault
message.
Anyone ever experienced anything like this or am I in my own private
hell?
 -Will