[ns] Fw: problem in Ricean Propagation model

[Wafa Ismail Ismail Bin Muhammad Baqrain]

i'm try to use  Ricean model instead of Two Ray Ground  in tcl script  but i 
met the following problems:

invalid command name "Propagation/Ricean"
while executing
"Propagation/Ricean create _o11 "
invoked from within
"catch "$className create $o $args" msg"
invoked from within
"if [catch "$className create $o $args" msg] {
if [string match "__FAILED_SHADOW_OBJECT_" $msg] {
delete $o
return ""
}