[ns] unexpected ns exit

[Jonathan L Bredin <jonathan@teide.cs.dartmouth.edu>]

hi all,

I am new to ns.  I have created an application class within ns in C++
that sends data over the network.  When I try to run my simulation, the
simulator crashes with the message:

ns: [Test instance] flush-trace: invalid command name "Test"
    while executing
"Test instance"

Does anyone have an idea of what is going wrong?  I don't see an instance
of any class called Test in the scripts in the installation.....  I am
using the all-in-one ns distribution on a Linux box.

Many thanks,

-- jon