[Harry Goldschmitt <harry@xxxxxxxx>]

I hope I've made an obvious mistake.

I'm writing a new plug in dissector under RH 7.2 Ethereal 0.8.18.  I 
have a large file of packets for the TCP based protocol I'm trying to 
dissect.  The dissector correctly creates lines in the traffic 
summary window, and via printf's I can see that it was entered once 
in the dissect_protocol routine with a non-zero tree.  At that time, 
I create a proto_tree for the first packet.  I can see it in the 
window, while the file is loading.  As soon as the load completes, my 
proto_tree disappears and my dissector is never entered again with a 
non-zero tree.  I can click around the summary window to my hearts 
content, but never another non-zero tree.  I've built my dissector 
based on the README.developer v. 1.28.

Harry Goldschmitt