diff --git a/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyAction.java b/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyAction.java
index 31bd6b1b61201f9a0ee1d2a4d41587c6dbaedec3..eb66bf7dedaeb06200507cd72c3dec8c4dd78170 100644
--- a/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyAction.java
+++ b/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyAction.java
@@ -32,10 +32,8 @@ public class CopyAction extends CopyPasteAbstractAction {
    *          - a plugin object
    * @param speciesList
    *          - list of species to annotate
-   * @param win
-   *          - main window of cell designer
    */
-  public void performAnnotation(CopyPastePlugin plug, PluginListOf speciesList, MainWindow win) {
+  public void performAnnotation(CopyPastePlugin plug, PluginListOf speciesList) {
 
     // if list is empty then just return from the method
     if (speciesList.size() == 0) {
diff --git a/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyPluginAction.java b/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyPluginAction.java
index e38720c08d9be2b9e30496d37822be6173c23e80..136e2735250b04a449ded2223aa83f1dde737e21 100644
--- a/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyPluginAction.java
+++ b/CellDesigner-plugin/src/main/java/lcsb/mapviewer/cdplugin/copypaste/CopyPluginAction.java
@@ -21,6 +21,7 @@ public class CopyPluginAction extends PluginAction {
    * Default class logger.
    */
   private Logger logger = Logger.getLogger(PasteAction.class.getName());
+
   /**
    * 
    */
@@ -30,10 +31,6 @@ public class CopyPluginAction extends PluginAction {
    * Plugin that access this action.
    */
   private CopyPastePlugin plug = null;
-  /**
-   * Main window of CellDesigner.
-   */
-  private MainWindow window;
 
   /**
    * Default constructor.
@@ -45,7 +42,6 @@ public class CopyPluginAction extends PluginAction {
    */
   public CopyPluginAction(CopyPastePlugin plugin, MainWindow win) {
     this.plug = plugin;
-    this.window = win;
   }
 
   @Override
@@ -53,7 +49,7 @@ public class CopyPluginAction extends PluginAction {
     try {
       CopyAction annotateAction = new CopyAction();
       PluginListOf list = plug.getSelectedAllNode();
-      annotateAction.performAnnotation(plug, list, window);
+      annotateAction.performAnnotation(plug, list);
     } catch (Exception ex) {
       logger.error(ex, ex);
     }