Index: /trunk/src/VBox/ExtPacks/VBoxDTrace/VBoxDTraceWrapper.cpp
===================================================================
--- /trunk/src/VBox/ExtPacks/VBoxDTrace/VBoxDTraceWrapper.cpp	(revision 54100)
+++ /trunk/src/VBox/ExtPacks/VBoxDTrace/VBoxDTraceWrapper.cpp	(revision 54101)
@@ -119,5 +119,5 @@
         if (!RTFileExists(szDTraceCmd))
             return RTMsgErrorExit(RTEXITCODE_FAILURE,
-                                  "Unable to find a DTrace implementation.");
+                                  "Unable to find a DTrace implementation. VBoxDTrace Extension Pack installed?");
         fIsNativeDTrace = false;
     }