can't read "dir": no such variable
    while executing
"file join $dir units.tcl"
    (in namespace eval "::request" script line 4)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
# Tcl package index file, version 1.1

if {![package vsatisfies [package provide Tcl] 8.1]} {return}
package ifneeded units 2.1.1 [list source [file join $dir units.tcl]]