after opening a list of conference items.
Connected to drag&drop behavior:
node "" does not exist
node "" does not exist
while executing
"Tree::itemcget .disco_1.tree {} -data"
("eval" body line 1)
invoked from within
"eval [linsert $args 0 Tree::$cmd .disco_1.tree]"
(procedure ".disco_1.tree" line 1)
invoked from within
"$path itemcget $item -data"
(procedure "Tree::item" line 12)
invoked from within
"Tree::item .disco_1.tree {} -values"
("eval" body line 1)
invoked from within
"eval [linsert $args 0 Tree::$cmd .disco_1.tree]"
(procedure ".disco_1.tree" line 1)
invoked from within
"$tw item $tnode -values"
(procedure "::disco::browser::draginitcmd" line 8)
invoked from within
"::disco::browser::draginitcmd .disco_1 .disco_1.tree.c 386 751 .drag"
("uplevel" body line 1)
invoked from within
"uplevel \#0 $drag(initcmd) [list $source $X $Y .drag]"
(procedure "_init_drag" line 10)
invoked from within
"_init_drag $source $state $X $Y"
(procedure "DragSite::_begin_drag" line 21)
invoked from within
"DragSite::_begin_drag motion .disco_1.tree.c 264 386 751"
(command bound to event)
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