invalid command name "TraCIClient"
    while executing
"TraCIClient create _o12 "
    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 ""
}
global errorInfo
error "class $..."
    (procedure "new" line 3)
    invoked from within
"new TraCIClient"
    invoked from within
"set mobilityInterfaceClient [new TraCIClient]"
    (file "/var/www/EMS_script/usr/s1h2a1w6n@gmail.com/2023-01-11-11-45-42/out.tcl" line 57)
num_nodes is set 38