Index: mttroot/mtt/lib/control/PPP/ppp_nlin.m
==================================================================
--- mttroot/mtt/lib/control/PPP/ppp_nlin.m
+++ mttroot/mtt/lib/control/PPP/ppp_nlin.m
@@ -1,8 +1,8 @@
-function [U, U_all, Error, Y] = ppp_nlin (system_name,x_0,par_0,sim,us,w,free,extras)
+function [U, U_all, Error, Y, its] = ppp_nlin (system_name,x_0,par_0,sim,us,w,free,extras)
 
-  ## usage:  [U, U_all, Error, Y] = ppp_nlin (system_name,x_0,par_0,sim,us,w,free,extras)
+  ## usage:  [U, U_all, Error, Y,its ] = ppp_nlin (system_name,x_0,par_0,sim,us,w,free,extras)
   ##
   ## 
   
   if nargin<8
     extras.criterion = 1e-8;
@@ -21,13 +21,13 @@
   if (n_us<>n_u)
     error(sprintf("Inputs (%i)  differenct to system inputs (%i)", n_us, n_u));
   endif
     
   ##Optimise
-  [par,Par,Error,Y] = ppp_optimise(s_system_name,x_0,par_0,sim,us,w,free,extras);
+  [par,Par,Error,Y,its] = ppp_optimise(s_system_name,x_0,par_0,sim,us,w,free,extras);
   
   U = par(free(:,1));
   U_all = Par(free(:,1),:);
 endfunction