Error during SESSION activate. I got the message
invalid command name "::request::global"
invalid command name "proc"
    while executing
"proc ::struct::graph::LoadAccelerator {key} {
    variable accel
    set r 0
    switch -exact -- $key {
	critcl {
	    # Critcl implementation of gra..."
    (file "/commun/linux/local/ActiveTcl-8.6.11/lib/struct-2.1/graph.tcl" line 32)
    invoked from within
"source /commun/linux/local/ActiveTcl-8.6.11/lib/struct-2.1/graph.tcl"
    ("package ifneeded struct::graph 2.4" script)
    invoked from within
"package require struct::graph     2.0"
    (in namespace eval "::request" script line 2)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)

OUTPUT BUFFER:

package require Tcl 8.2 package require struct::graph 2.0 package require struct::queue 1.2.1 package require struct::stack 1.2.1 package require struct::tree 2.0 package require struct::matrix 2.0 package require struct::pool 1.2.1 package require struct::record 1.2.1 package require struct::list 1.4 package require struct::set 2.1 package require struct::prioqueue 1.3 package require struct::skiplist 1.3 namespace eval ::struct { namespace export * } package provide struct 2.1