Index: sources/canbus/MessageGlobals.h
===================================================================
diff -u -r86acb3c49bfc7c4ed8fc860d895c0603b4816b3a -r13e65c3d271d503c2e2e2f1f20736652c470f8cc
--- sources/canbus/MessageGlobals.h	(.../MessageGlobals.h)	(revision 86acb3c49bfc7c4ed8fc860d895c0603b4816b3a)
+++ sources/canbus/MessageGlobals.h	(.../MessageGlobals.h)	(revision 13e65c3d271d503c2e2e2f1f20736652c470f8cc)
@@ -49,13 +49,13 @@
     // but if the model still needs more the model will fail.
     // so it is better to keep them next to each other to make sure they are in sync.
     // ----
-    {Gui::GuiActionType::ID_PowerOff                                ,   1           },
+    {Gui::GuiActionType::ID_PowerOff                                ,   1           }, // 1 byte
     {Gui::GuiActionType::ID_ShuttingDown                            ,   0           },
     {Gui::GuiActionType::ID_KeepAlive                               , 255           }, // 0 => 255 to be able to run a multi-frame test.
 
     // Generic Confirm
     {Gui::GuiActionType::ID_DuetConfirmHDi                          ,   3 * 4       }, // 3 parameters each 4bytes
-    {Gui::GuiActionType::ID_DuetConfirmUIr                          ,   3 * 4       }, // 3 parameters each 4bytes
+    {Gui::GuiActionType::ID_DuetConfirmUIr                          ,   2 * 4       }, // 2 parameters each 4bytes
 
     // POST
     {Gui::GuiActionType::ID_HDPostSingleResultData                  ,   2 * 4       }, // 2 parameters each 4bytes