[ns] what is incomplete-type in ns2?

[张慧翔]

Hi all,
    When i run my tcl script about xcp, I got a float point exception.
I debug ns with gdb. When I wanted to display the value of cwnd_ in
window() of tcpreno.cc, gdb show me it is <incomplete-type> and
window() returned with 0. So It lead to a float point exception.
But what did <incomplete-type> mean? and how to fix it?

Best regards.
Zhang huixiang