Hi all ! Thanks for your helping.
I just successfully installed Ns-2.1b6 on RedHat Linux to use OWns with environment variabale (.bashrc): export NS_HOME=/home/an/ns-allinone-2.1b6 export PATH=$NS_HOME/ns-2.1b6:$NS_HOME/bin:$NS_HOME/tcl8.0.4/unix:$NS_HOME/bin:$PATH export PATH=$NS_HOME/tk8.0.4/unix:$NS_HOME/nam-1.11:$NS_HOME/xgraph-12.1:$PATH export LD_LIBRARY_PATH=$NS_HOME/otcl-1.0a5:$NS_HOME/tclcl-1.0b9:$LD_LIBRARY_PATHexport LD_LIBRARY_PATH=$NS_HOME/lib:$LD_LIBRARY_PATH export TCL_LIBRARY=$NS_HOME/tcl8.0.4/library But when I use NS command to compile owns_demo.tcl then have error with report: ENVIRONMENT VARIABALE NS-2 NOT SET. Could you understand that report ? If could, pls tell me as soon as posible ! Thanks again. Best Regards.