can't read "dir": no such variable
    while executing
"file join $dir jpeg.tcl"
    (in namespace eval "::request" script line 2)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
if {![package vsatisfies [package provide Tcl] 8.2]} {return}
package ifneeded jpeg 0.5 [list source [file join $dir jpeg.tcl]]