Add warning

Author: willend

mcstas-comps/contrib/Al_window.comp

@@ -64,6 +64,13 @@ SHARE
   #endif
 %}
 
+INITIALIZE
+%{
+  MPI_MASTER(
+    fprintf(stderr,"Al_window %s WARNING: Using simple lo-fi transmission model.\n - Replace with PowderN or NCrystal for bragg edges etc.\n",NAME_CURRENT_COMP);
+  );
+%}
+
 TRACE
 %{
   double v;   /* Neutron velocity */