Index: trunk/FACT++/scripts/Observation_class.js
===================================================================
--- trunk/FACT++/scripts/Observation_class.js	(revision 16071)
+++ trunk/FACT++/scripts/Observation_class.js	(revision 16074)
@@ -80,7 +80,11 @@
             break;
 
+        case 'SINGLEPE':
+        case 'DRSCALIB':
+        case 'IDLE':
+            break;
+
         default:
-            throw new Error(" the task of this observation:"+this.task+
-                            "is not implemented. use one of: DATA, STARTUP, SHUTDOWN, RATESCAN.");
+            throw new Error("The observation type "+ret[i].task+" is unknown.");
         }
     }