diff --git a/ummisco.gama.product/extraresources/headless/osx/samples/predatorPrey.xml b/ummisco.gama.product/extraresources/headless/osx/samples/predatorPrey.xml
index 24ddb45e47..1ad162c060 100644
--- a/ummisco.gama.product/extraresources/headless/osx/samples/predatorPrey.xml
+++ b/ummisco.gama.product/extraresources/headless/osx/samples/predatorPrey.xml
@@ -1,12 +1,20 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <Experiment_plan>
-	<Simulation id="2" sourcePath="./predatorPrey/predatorPrey.gaml" finalStep="50" experiment="prey_predatorExp" seed="3">
-	  <Parameters>
-	    <Parameter name="Nb predators: " type="INT" value="2" />
-	    <Parameter var="nb_preys_init" type="INT" value="6" />
-	  </Parameters>
-	  <Outputs>
-	    <Output id="1" name="main_display" framerate="5" />
-	  </Outputs>
+	<Simulation experiment="prey_predatorExp" finalStep="1000" id="0" seed="1.0" sourcePath="./samples/predatorPrey/predatorPrey.gaml">
+		<Parameters>
+			<Parameter name="Nb Preys: " type="INT" value="200" var="nb_preys_init"/>
+			<Parameter name="Prey max energy: " type="FLOAT" value="1.0" var="prey_max_energy"/>
+			<Parameter name="Prey max transfert: " type="FLOAT" value="0.1" var="prey_max_transfert"/>
+			<Parameter name="Prey energy consumption: " type="FLOAT" value="0.05" var="prey_energy_consum"/>
+			<Parameter name="Nb predators: " type="INT" value="20" var="nb_predators_init"/>
+			<Parameter name="Predator max energy: " type="FLOAT" value="1.0" var="predator_max_energy"/>
+			<Parameter name="Predator energy transfert: " type="FLOAT" value="0.5" var="predator_energy_transfert"/>
+			<Parameter name="Predator energy consumption: " type="FLOAT" value="0.02" var="predator_energy_consum"/>
+		</Parameters>
+		<Outputs>
+			<Output framerate="1" id="0" name="Number of preys"/>
+			<Output framerate="1" id="1" name="Number of predators"/>
+			<Output framerate="1" id="2" name="main_display"/>
+		</Outputs>
 	</Simulation>
 </Experiment_plan>
\ No newline at end of file
diff --git a/ummisco.gama.product/extraresources/headless/unix/samples/predatorPrey.xml b/ummisco.gama.product/extraresources/headless/unix/samples/predatorPrey.xml
index 24ddb45e47..1ad162c060 100644
--- a/ummisco.gama.product/extraresources/headless/unix/samples/predatorPrey.xml
+++ b/ummisco.gama.product/extraresources/headless/unix/samples/predatorPrey.xml
@@ -1,12 +1,20 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <Experiment_plan>
-	<Simulation id="2" sourcePath="./predatorPrey/predatorPrey.gaml" finalStep="50" experiment="prey_predatorExp" seed="3">
-	  <Parameters>
-	    <Parameter name="Nb predators: " type="INT" value="2" />
-	    <Parameter var="nb_preys_init" type="INT" value="6" />
-	  </Parameters>
-	  <Outputs>
-	    <Output id="1" name="main_display" framerate="5" />
-	  </Outputs>
+	<Simulation experiment="prey_predatorExp" finalStep="1000" id="0" seed="1.0" sourcePath="./samples/predatorPrey/predatorPrey.gaml">
+		<Parameters>
+			<Parameter name="Nb Preys: " type="INT" value="200" var="nb_preys_init"/>
+			<Parameter name="Prey max energy: " type="FLOAT" value="1.0" var="prey_max_energy"/>
+			<Parameter name="Prey max transfert: " type="FLOAT" value="0.1" var="prey_max_transfert"/>
+			<Parameter name="Prey energy consumption: " type="FLOAT" value="0.05" var="prey_energy_consum"/>
+			<Parameter name="Nb predators: " type="INT" value="20" var="nb_predators_init"/>
+			<Parameter name="Predator max energy: " type="FLOAT" value="1.0" var="predator_max_energy"/>
+			<Parameter name="Predator energy transfert: " type="FLOAT" value="0.5" var="predator_energy_transfert"/>
+			<Parameter name="Predator energy consumption: " type="FLOAT" value="0.02" var="predator_energy_consum"/>
+		</Parameters>
+		<Outputs>
+			<Output framerate="1" id="0" name="Number of preys"/>
+			<Output framerate="1" id="1" name="Number of predators"/>
+			<Output framerate="1" id="2" name="main_display"/>
+		</Outputs>
 	</Simulation>
 </Experiment_plan>
\ No newline at end of file
diff --git a/ummisco.gama.product/extraresources/headless/windows/samples/predatorPrey.xml b/ummisco.gama.product/extraresources/headless/windows/samples/predatorPrey.xml
index 24ddb45e47..1ad162c060 100644
--- a/ummisco.gama.product/extraresources/headless/windows/samples/predatorPrey.xml
+++ b/ummisco.gama.product/extraresources/headless/windows/samples/predatorPrey.xml
@@ -1,12 +1,20 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <Experiment_plan>
-	<Simulation id="2" sourcePath="./predatorPrey/predatorPrey.gaml" finalStep="50" experiment="prey_predatorExp" seed="3">
-	  <Parameters>
-	    <Parameter name="Nb predators: " type="INT" value="2" />
-	    <Parameter var="nb_preys_init" type="INT" value="6" />
-	  </Parameters>
-	  <Outputs>
-	    <Output id="1" name="main_display" framerate="5" />
-	  </Outputs>
+	<Simulation experiment="prey_predatorExp" finalStep="1000" id="0" seed="1.0" sourcePath="./samples/predatorPrey/predatorPrey.gaml">
+		<Parameters>
+			<Parameter name="Nb Preys: " type="INT" value="200" var="nb_preys_init"/>
+			<Parameter name="Prey max energy: " type="FLOAT" value="1.0" var="prey_max_energy"/>
+			<Parameter name="Prey max transfert: " type="FLOAT" value="0.1" var="prey_max_transfert"/>
+			<Parameter name="Prey energy consumption: " type="FLOAT" value="0.05" var="prey_energy_consum"/>
+			<Parameter name="Nb predators: " type="INT" value="20" var="nb_predators_init"/>
+			<Parameter name="Predator max energy: " type="FLOAT" value="1.0" var="predator_max_energy"/>
+			<Parameter name="Predator energy transfert: " type="FLOAT" value="0.5" var="predator_energy_transfert"/>
+			<Parameter name="Predator energy consumption: " type="FLOAT" value="0.02" var="predator_energy_consum"/>
+		</Parameters>
+		<Outputs>
+			<Output framerate="1" id="0" name="Number of preys"/>
+			<Output framerate="1" id="1" name="Number of predators"/>
+			<Output framerate="1" id="2" name="main_display"/>
+		</Outputs>
 	</Simulation>
 </Experiment_plan>
\ No newline at end of file