check first if the transition is possible

master/bt5/vifib_base/WorkflowTemplateItem/portal_workflow/slave_instance_slap_interface_workflow/scripts/SlaveInstance_startComputerPartition.xml

@@ -50,9 +50,11 @@
         </item>
         <item>
             <key> <string>_body</string> </key>
-            <value> <string>packing_list_line = context.SlaveInstance_getInstanceHostingPackingListLine(state_change)\n
+            <value> <string>isTransitionPossible = context.portal_workflow.isTransitionPossible\n
+packing_list_line = context.SlaveInstance_getInstanceHostingPackingListLine(state_change)\n
 packing_list = packing_list_line.getParentValue()\n
-packing_list.start()\n
+if isTransitionPossible(packing_list, "start"):\n
+  packing_list.start()\n
 </string> </value>
         </item>
         <item>

master/bt5/vifib_base/WorkflowTemplateItem/portal_workflow/slave_instance_slap_interface_workflow/scripts/SlaveInstance_stopComputerPartition.xml

@@ -54,8 +54,10 @@
   packing_list_line = context.SlaveInstance_getInstanceHostingPackingListLine(state_change)\n
 except ValueError:\n
   return\n
+isTransitionPossible = context.portal_workflow.isTransitionPossible\n
 packing_list = packing_list_line.getParentValue()\n
-packing_list.deliver()\n
+if isTransitionPossible(packing_list, "deliver"):\n
+  packing_list.deliver()\n
 </string> </value>
         </item>
         <item>

master/bt5/vifib_base/WorkflowTemplateItem/portal_workflow/slave_instance_slap_interface_workflow/scripts/SlaveInstance_stopComputerPartitionInstallation.xml

@@ -52,7 +52,8 @@
             <key> <string>_body</string> </key>
             <value> <string>packing_list_line = context.SlaveInstance_getInstanceSetupPackingListLine(state_change)\n
 packing_list = packing_list_line.getParentValue()\n
-if packing_list.getPortalObject().portal_workflow.isTransitionPossible(packing_list, \'stop\'):\n
+isTransitionPossible = context.portal_workflow.isTransitionPossible\n
+if isTransitionPossible(packing_list, \'stop\'):\n
   packing_list.stop()\n
 </string> </value>
         </item>