Index: openacs-4/packages/imsld/lib/activity-tree.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/imsld/lib/activity-tree.tcl,v
diff -u -r1.5 -r1.6
--- openacs-4/packages/imsld/lib/activity-tree.tcl	12 Jan 2010 18:24:50 -0000	1.5
+++ openacs-4/packages/imsld/lib/activity-tree.tcl	13 Jan 2010 16:13:44 -0000	1.6
@@ -59,7 +59,11 @@
     } else {
 
         set started_p [db_0or1row as_started_p { *SQL* }]
-        if { $started_p } {
+        set has_visible_child_p [imsld::runtime::activity_structure::has_visible_child_p \
+                                     -run_id $run_id \
+                                     -user_id $user_id \
+                                     -structure_id $activity_id]
+        if { $started_p && $has_visible_child_p } {
             multirow append activities $activity_id $type $play_id $act_id $role_part_id
         }
     }