Index: /trunk/FACT++/src/lidctrl.cc
===================================================================
--- /trunk/FACT++/src/lidctrl.cc	(revision 15121)
+++ /trunk/FACT++/src/lidctrl.cc	(revision 15122)
@@ -355,6 +355,6 @@
 
         // Unidentified state detected
-        if ((fLid1.status!="Open" && fLid1.status!="Closed" && fLid1.status!="Power Problem" && fLid1.status!="Unknown") ||
-            (fLid2.status!="Open" && fLid2.status!="Closed" && fLid2.status!="Power Problem" && fLid2.status!="Unknown"))
+        if ((!fLid1.status.empty() && fLid1.status!="Open" && fLid1.status!="Closed" && fLid1.status!="Power Problem" && fLid1.status!="Unknown") ||
+            (!fLid2.status.empty() && fLid2.status!="Open" && fLid2.status!="Closed" && fLid2.status!="Power Problem" && fLid2.status!="Unknown"))
             return State::kUnidentified;