diff --git a/prism/src/userinterface/simulator/GUISimulator.java b/prism/src/userinterface/simulator/GUISimulator.java
index 4f40efb1..21b16bb2 100644
--- a/prism/src/userinterface/simulator/GUISimulator.java
+++ b/prism/src/userinterface/simulator/GUISimulator.java
@@ -50,7 +50,6 @@ public class GUISimulator extends GUIPlugin implements MouseListener, ListSelect
 	private static final long serialVersionUID = 1L;
 
 	//ATTRIBUTES
-	private GUIPrism gui; //reference to the gui
 	private GUIMultiProperties guiProp; //reference to the properties information
 	private GUIMultiModel guiMultiModel; //reference to the model plugin
 	private SimulatorEngine engine;
@@ -316,7 +315,7 @@ public class GUISimulator extends GUIPlugin implements MouseListener, ListSelect
 			// (just get contants needed for properties file labels)
 			UndefinedConstants uCon = new UndefinedConstants(parsedModel, pf, true);
 			if (uCon.getMFNumUndefined() + uCon.getPFNumUndefined() > 0) {
-				int result = GUIConstantsPicker.defineConstantsWithDialog(gui, uCon, lastConstants, lastPropertyConstants);
+				int result = GUIConstantsPicker.defineConstantsWithDialog(getGUI(), uCon, lastConstants, lastPropertyConstants);
 				if (result != GUIConstantsPicker.VALUES_DONE)
 					return;
 			}
@@ -405,7 +404,7 @@ public class GUISimulator extends GUIPlugin implements MouseListener, ListSelect
 			lastInitialState = initialState;
 
 			if (getPrism().getSettings().getBoolean(PrismSettings.SIMULATOR_NEW_PATH_ASK_VIEW)) {
-				new GUIViewDialog(gui, pathTableModel.getView(), pathTableModel);
+				new GUIViewDialog(getGUI(), pathTableModel.getView(), pathTableModel);
 			}
 
 		} catch (PrismException e) {
@@ -618,7 +617,7 @@ public class GUISimulator extends GUIPlugin implements MouseListener, ListSelect
 
 	public void a_configureView()
 	{
-		new GUIViewDialog(gui, pathTableModel.getView(), pathTableModel);
+		new GUIViewDialog(getGUI(), pathTableModel.getView(), pathTableModel);
 	}
 
 	/**
diff --git a/prism/src/userinterface/simulator/GUIViewDialog.java b/prism/src/userinterface/simulator/GUIViewDialog.java
index d67199dc..707fae31 100644
--- a/prism/src/userinterface/simulator/GUIViewDialog.java
+++ b/prism/src/userinterface/simulator/GUIViewDialog.java
@@ -128,7 +128,7 @@ public class GUIViewDialog extends JDialog implements KeyListener
 		setResizable(true);
 		setLocationRelativeTo(getParent()); // centre
 
-		this.askOption = ((GUIPrism) this.getParent()).getPrism().getSettings().getBoolean(PrismSettings.SIMULATOR_NEW_PATH_ASK_VIEW);
+		this.askOption = gui.getPrism().getSettings().getBoolean(PrismSettings.SIMULATOR_NEW_PATH_ASK_VIEW);
 		optionCheckBox.setSelected(this.askOption);
 
 		showTimeCheckBox.setSelected(view.showTime());
@@ -682,7 +682,7 @@ public class GUIViewDialog extends JDialog implements KeyListener
 			this.askOption = !this.askOption;
 
 			try {
-				((GUIPrism) this.getParent()).getPrism().getSettings().set(PrismSettings.SIMULATOR_NEW_PATH_ASK_VIEW, this.askOption);
+				gui.getPrism().getSettings().set(PrismSettings.SIMULATOR_NEW_PATH_ASK_VIEW, this.askOption);
 			} catch (PrismException e) {
 			}
 		}