Try create updation only when no cleanup is in progress.

master/bt5/vifib_base/WorkflowTemplateItem/portal_workflow/software_instance_slap_interface_workflow/scripts/SoftwareInstance_bangSoftwareInstanceTree.xml

@@ -62,6 +62,10 @@ for software_instance in context.portal_catalog(\n
   portal_type=\'Software Instance\',\n
   root_uid=root_software_instance.getUid()):\n
   software_instance = software_instance.getObject()\n
+  try:\n
+    software_instance.Item_getInstancePackingListLine(service_relative_url=portal.portal_preferences.getPreferredInstanceCleanupResource())\n
+  except ValueError:\n
+    #no instance cleanup, there is sense to try to destroy\n
     software_instance.activate().requestUpdateComputerPartition()\n
 </string> </value>
         </item>

master/bt5/vifib_base/bt/revision

-317
+318
\ No newline at end of file