can't read "dir": no such variable
    while executing
"file join $dir random.tcl"
    (in namespace eval "::request" script line 1)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
package ifneeded simulation::random 0.4.0 [list source [file join $dir random.tcl]]
package ifneeded simulation::montecarlo 0.1 [list source [file join $dir montecarlo.tcl]]
package ifneeded simulation::annealing 0.2 [list source [file join $dir annealing.tcl]]