diff --git a/GUIs/GuiRsa.mlapp b/GUIs/GuiRsa.mlapp
index 0b2cbc5..5965bcf 100644
Binary files a/GUIs/GuiRsa.mlapp and b/GUIs/GuiRsa.mlapp differ
diff --git a/Utility functions/runInstrumentWithGui.m b/Utility functions/runInstrumentWithGui.m
index 861e3c6..9e6b328 100644
--- a/Utility functions/runInstrumentWithGui.m	
+++ b/Utility functions/runInstrumentWithGui.m	
@@ -1,54 +1,54 @@
-% Create instrument instance with gui and add it to the collector
+% Create an instrument instance with gui add them to the collector
 
-function [Instr, GuiInstr] = runInstrumentWithGui(name, instr_class, gui, varargin)
+function [Instr, Gui] = runInstrumentWithGui(name, instr_class, gui, varargin)
 
     % Get the unique instance of Collector
     Collector = MyCollector.instance();
 
     % Run instrument first
     if nargin==1
         
         % load parameters from InstrumentList
         InstrumentList = getLocalSettings('InstrumentList');
         
         assert(isfield(InstrumentList, name), [name ' must be a field ' ...
             'of InstrumentList.'])
         
         assert(isfield(InstrumentList.(name), 'gui'), ...
             ['InstrumentList entry ' name ' has no ''gui'' field.'])
         
         gui = InstrumentList.(name).gui;
         Instr = runInstrument(name);
     else
         
         % All the arguments are supplied explicitly
         Instr = runInstrument(name, instr_class, varargin{:});
     end
     
     % Check if the instrument already has GUI
-    Gui = getInstrumentGui(this, name);
+    Gui = getInstrumentGui(Collector, name);
     if isempty(Gui)
         
         % Run a new GUI and store it in the collector
         Gui = feval(gui, Instr);
-        addInstrumentGui(this, name, Gui);
+        addInstrumentGui(Collector, name, Gui);
         
         % Display the instrument's name 
         Fig = findfigure(Gui);
         if ~isempty(Fig)
            Fig.Name = char(name);
         else
            warning('No UIFigure found to assign the name')
         end
     else
         
         % Bring the window of existing GUI to the front
         try
             Fig = findfigure(Gui);
             Fig.Visible = 'off';
             Fig.Visible = 'on';
         catch
         end
     end
 end