[ns] help of executing wireless1.tcl in example of tutorial needed!

hi ,all, I installed both ns2.7 and ns2.9 in my cygwin ,I don't whether the following error is due to this. When i executed the wireless1.tcl(and wireless2.tcl,wireless3.tcl),the following message displays.I don't know why.The setting of -channel in the tutorial is the same with wireles

[ns] help of executing wireless1.tcl in example of tutorial needed!

-- Mohamed Rizk FCI-CU IT Department

[ns] help of executing wireless1.tcl in example of tutorial needed!

from the terminal...go to the example folder, then type >> ns example1.tcl enter. that's it!!