--- a/Framework/Orthanc/Core/Enumerations.cpp	Wed Oct 26 12:14:03 2016 +0200
+++ b/Framework/Orthanc/Core/Enumerations.cpp	Wed Nov 09 14:14:34 2016 +0100
@@ -64,7 +64,7 @@
         return "Parameter out of range";
 
       case ErrorCode_NotEnoughMemory:
-        return "Not enough memory";
+        return "The server hosting Orthanc is running out of memory";
 
       case ErrorCode_BadParameterType:
         return "Bad type for a parameter";
@@ -156,6 +156,9 @@
       case ErrorCode_NotAcceptable:
         return "Cannot send a response which is acceptable according to the Accept HTTP header";
 
+      case ErrorCode_NullPointer:
+        return "Cannot handle a NULL pointer";
+
       case ErrorCode_SQLiteNotOpened:
         return "SQLite: The database is not opened";