Index: /trunk/src/VBox/Main/include/VirtualBoxImpl.h
===================================================================
--- /trunk/src/VBox/Main/include/VirtualBoxImpl.h	(revision 31267)
+++ /trunk/src/VBox/Main/include/VirtualBoxImpl.h	(revision 31268)
@@ -218,5 +218,5 @@
     bool isMachineIdValid(const Guid &aId)
     {
-        return SUCCEEDED(findMachine(aId, false /* aSetError */, NULL));
+        return SUCCEEDED(findMachine(aId, true /* fPermitInaccessible */, false /* aSetError */, NULL));
     }