Use override instead of rewriting the XML-file

Using the override flag of simulations is much more efficient,
especially for large models.

UsersGuide/source/scripting_api.rst

@@ -44,13 +44,10 @@ Following example shows how to update the parameters and re-run the simulation w
   buildModel(BouncingBall);
   getErrorString();
   for i in 1:3 loop
-    // BouncingBall_init.xml file will be generated because of buildModel call above.
     // We update the parameter e start value from 0.7 to "0.7 + i".
     value := 0.7 + i;
-    setInitXmlStartValue("BouncingBall_init.xml", "e", String(value) , "BouncingBall_init.xml");
-    getErrorString();
     // call the generated simulation code to produce a result file BouncingBall%i%_res.mat
-    system("BouncingBall.exe -r=BouncingBall" + String(i) + "_res.mat");
+    system("./BouncingBall -override=e="+String(value)+" -r=BouncingBall" + String(i) + "_res.mat");
     getErrorString();
   end for;