Hello, Could somedy say to me how I can start the debugger from a tcl script for ns. Thank you, Nima. --------------------------------------- Nima NAFISI Stamford Apartements 4 bis rue Jeanne D'Arc 127 Stamford street 45000 ORLEANS LONDON SE1 9NQ tel 079 50 53 12 78 tel +33 2 38 81 14 91