--- a/Framework/Orthanc/Core/Enumerations.h	Wed Oct 26 12:14:03 2016 +0200
+++ b/Framework/Orthanc/Core/Enumerations.h	Wed Nov 09 14:14:34 2016 +0100
@@ -52,7 +52,7 @@
     ErrorCode_Plugin = 1    /*!< Error encountered within the plugin engine */,
     ErrorCode_NotImplemented = 2    /*!< Not implemented yet */,
     ErrorCode_ParameterOutOfRange = 3    /*!< Parameter out of range */,
-    ErrorCode_NotEnoughMemory = 4    /*!< Not enough memory */,
+    ErrorCode_NotEnoughMemory = 4    /*!< The server hosting Orthanc is running out of memory */,
     ErrorCode_BadParameterType = 5    /*!< Bad type for a parameter */,
     ErrorCode_BadSequenceOfCalls = 6    /*!< Bad sequence of calls */,
     ErrorCode_InexistentItem = 7    /*!< Accessing an inexistent item */,
@@ -83,6 +83,7 @@
     ErrorCode_StorageAreaPlugin = 32    /*!< Error in the plugin implementing a custom storage area */,
     ErrorCode_EmptyRequest = 33    /*!< The request is empty */,
     ErrorCode_NotAcceptable = 34    /*!< Cannot send a response which is acceptable according to the Accept HTTP header */,
+    ErrorCode_NullPointer = 35    /*!< Cannot handle a NULL pointer */,
     ErrorCode_SQLiteNotOpened = 1000    /*!< SQLite: The database is not opened */,
     ErrorCode_SQLiteAlreadyOpened = 1001    /*!< SQLite: Connection is already open */,
     ErrorCode_SQLiteCannotOpen = 1002    /*!< SQLite: Unable to open the database */,