[ns] a problem when execute a example from Section V in Marc Greis' Tutorial

Hi everybody, i‘m using ns-allinone-2.35 at CYGWIN_NT-6.1 inagtech 1.7.11(0.260/5/3) 2012-02-24 14:05 i686 Cygwin, and start with `Marc Greis' Tutorial for the UCB/LBNL/VINT Network Simulator "ns"`. i write down the example in Section V as following, # first of all, create a simulator object s

[ns] NAM close abnormally

Hi everybody, I installed ns-allinone-2.35 in Cygwin 1.7.11. Sometimes the NAM graphic interface will close abnormally, for example resize the the NAM graphic interface, or drag the node after clicking at the Edit/View button. Thanks for your help.