Index: /issm/trunk-jpl/src/c/cores/controlm1qn3_core.cpp
===================================================================
--- /issm/trunk-jpl/src/c/cores/controlm1qn3_core.cpp	(revision 23285)
+++ /issm/trunk-jpl/src/c/cores/controlm1qn3_core.cpp	(revision 23286)
@@ -280,4 +280,4 @@
 
 #else
-void controlm1qn3_core(FemModel* femmodel){_error_("M1QN3 not installed");}
+void controlm1qn3_core(FemModel* femmodel){_error_("M1QN3 not installed (or you might have turned AD on)");}
 #endif //_HAVE_M1QN3_