Only be interested in Software Instances.

master/bt5/vifib_base/SkinTemplateItem/portal_skins/vifib_base/ComputerPartition_getAvailableSoftwareReleaseUrlStringList.xml

@@ -62,7 +62,7 @@ elif slap_state == \'busy\':\n
 \n
   # Partition under destruction does not accept new slave\n
   try:\n
-    delivery_line = context.Item_getInstancePackingListLine(service_relative_url=portal_preferences.getPreferredInstanceCleanupResource())\n
+    delivery_line = context.Item_getInstancePackingListLine(service_relative_url=portal_preferences.getPreferredInstanceCleanupResource(), aggregate_portal_type=\'Software Instance\')\n
   except ValueError:\n
     pass\n
   else:\n

master/bt5/vifib_base/bt/revision

-322
+323
\ No newline at end of file