Index: mttroot/mtt/lib/rep/sfun_rep/sfun_interface.c.tmpl
==================================================================
--- mttroot/mtt/lib/rep/sfun_rep/sfun_interface.c.tmpl
+++ mttroot/mtt/lib/rep/sfun_rep/sfun_interface.c.tmpl
@@ -32,19 +32,19 @@
 const int NumberOfControllerInputs	= 1; /* inputs TO controller */
 const int NumberOfControllerOutputs	= 1; /* outputs FROM controller */
 /* End EDIT */
 
 static void
-<mtt_model_name>_process_inputs (void)
+<mtt_model_name>_process_inputs (SimStruct *S)
 {
   /* insert <mtt_model_name>_struc.c */
 
   /* Start EDIT */
   /* Edit this block to process the model inputs and outputs */
   
   /* Remove the following line */
-  fprintf (stderr, "*** Error: <mtt_model_name>_sfun_interface.c has not been customised!\n"); return;
+  ssSetErrorStatus (S, "<mtt_model_name>_sfun_interface.c has not been customised!\n");
 
   /* simple example follows */
 
   /* Get total of all outputs and input to controller */
   controller_inputs[0] = 0.0;
@@ -191,11 +191,11 @@
   PRINT_ENTER;
 
   update_inputs_from_simulink (S);
   update_simtime_from_simulink (S);
 
-  <mtt_model_name>_process_inputs ();
+  <mtt_model_name>_process_inputs (S);
 
   UNUSED_ARG(tid); /* not used in single tasking mode */
 
   for (i = 0; i < MTTNU; i++) {
     ssGetOutputPortRealSignal (S, 0)[i] = mttu[i];