can't read "dir": no such variable
    while executing
"list tclPkgSetup $dir combobox 2.3 {{combobox.tcl source ::combobox::combobox}}"
    (in namespace eval "::request" script line 3)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
package ifneeded combobox 2.3 \
    [list tclPkgSetup $dir combobox 2.3 {{combobox.tcl source ::combobox::combobox}}]