thanks tathagata and all who answered effectively I added the path of that directories, but in the wrong form (e.g., path="c:\cygwin\ns-allinone-2.29" instead of path="/ns-allinone-2.29" and similar)
now the more difficult task: understand ns.... ;-) sergio >From: "tathagata dasgupta" <[EMAIL PROTECTED]> >To: "Sergio Torassa" <[EMAIL PROTECTED]> >Subject: Re: [ns] FW: Re: nam: permission denied >Date: Fri, 14 Apr 2006 04:01:54 +0530 > >You need to add(PATH=$PATH:/..) the absolute paths of the directories that >house the binaries for nam and ns to your path variable. >for example >My PATH variable looks like this >/usr/local/bin:/usr/local/sbin:/sbin:/usr/sbin:/bin:/usr/bin:/usr/bin/X11:/usr/games:/bin/:/usr/sbin:/opt/jdk1.5.0_06/bin:/usr/local/ns-2/ns- >2.29:/usr/local/ns-2 > >I had the same problem like yours and chaging it took care >Hope this helps