invalid command name "toplevel"
    while executing
"toplevel $t"
    (in namespace eval "::request" script line 4)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
#!/usr/local/bin/wish

set t .t
toplevel $t

set f .t.f
frame $f 

set ff $f.f
frame $ff -bd 20 -relief "flat" -background red
set l $ff.l
label $l -text "flat" 

set ff2 $f.f2
frame $ff2 -bd 10  -relief "groove"
set l2 $ff2.l2
label $l2 -text "groove" 
button $l2.b1 -relief sunken -text sunken
button $l2.b2 -relief raised -text raised

pack $f
pack $ff -side bottom
pack $ff2 -side bottom
pack $l
pack $l2
pack $l2.b1 $l2.b2