diff --git a/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java b/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java
index ab92c51..ba805c5 100755
--- a/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java
+++ b/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java
@@ -121,7 +121,13 @@ class AppleDiskTab extends AbstractTab
   void redoEvent (RedoEvent event)
   {
     AppleFileSource afs = ((FileSelectedEvent) event.value).appleFileSource;
-    selectNode (((FileSelectedEvent) event.value).appleFileSource.getUniqueName ());
+    FileSelectedEvent fileSelectedEvent = (FileSelectedEvent) event.value;
+    if (fileSelectedEvent.volumeNo >= 0)
+    {
+      DualDosDisk ddd = (DualDosDisk) afs.getFormattedDisk ().getParent ();
+      ddd.setCurrentDiskNo (fileSelectedEvent.volumeNo);
+    }
+    selectNode (fileSelectedEvent.appleFileSource.getUniqueName ());
   }
 
   private DefaultMutableTreeNode findNode (String nodeName)
diff --git a/src/com/bytezone/diskbrowser/gui/CatalogPanel.java b/src/com/bytezone/diskbrowser/gui/CatalogPanel.java
index 644349e..ff400b0 100755
--- a/src/com/bytezone/diskbrowser/gui/CatalogPanel.java
+++ b/src/com/bytezone/diskbrowser/gui/CatalogPanel.java
@@ -116,7 +116,7 @@ class CatalogPanel extends JTabbedPane
 
   // called after a double-click in the fileTab
   // ---------------------------------------------------------------------------------//
-  public void addDiskPanel (FormattedDisk disk, String lastFileUsed, boolean activate)
+  public void addDiskPanel (FormattedDisk disk, boolean activate)
   // ---------------------------------------------------------------------------------//
   {
     int tabNo = 1;
@@ -433,7 +433,7 @@ class CatalogPanel extends JTabbedPane
         //        lister.catalogLister.setNode (selectedNode);
       }
       else if (e.getClickCount () == 2)
-        addDiskPanel (node.getFormattedDisk (), null, true);
+        addDiskPanel (node.getFormattedDisk (), true);
     }
   }
 
diff --git a/src/com/bytezone/diskbrowser/gui/FileSelectedEvent.java b/src/com/bytezone/diskbrowser/gui/FileSelectedEvent.java
index 9298ee8..f3bbc96 100755
--- a/src/com/bytezone/diskbrowser/gui/FileSelectedEvent.java
+++ b/src/com/bytezone/diskbrowser/gui/FileSelectedEvent.java
@@ -10,6 +10,7 @@ public class FileSelectedEvent extends EventObject
 {
   public final AppleFileSource appleFileSource;
   boolean redo;
+  int volumeNo = -1;
 
   public FileSelectedEvent (Object source, AppleFileSource appleFileSource)
   {
@@ -21,7 +22,10 @@ public class FileSelectedEvent extends EventObject
     FormattedDisk fd = appleFileSource.getFormattedDisk ();
     DualDosDisk ddd = (DualDosDisk) fd.getParent ();
     if (ddd != null)
+    {
       ddd.setCurrentDisk (fd);
+      volumeNo = ddd.getCurrentDiskNo ();
+    }
   }
 
   @Override
diff --git a/src/com/bytezone/diskbrowser/utilities/Utility.java b/src/com/bytezone/diskbrowser/utilities/Utility.java
index 8fbd8ab..d11cacb 100644
--- a/src/com/bytezone/diskbrowser/utilities/Utility.java
+++ b/src/com/bytezone/diskbrowser/utilities/Utility.java
@@ -22,6 +22,14 @@ public class Utility
         .equals (AffineTransform.getScaleInstance (2.0, 2.0));
   }
 
+  // ---------------------------------------------------------------------------------//
+  public static void printStackTrace ()
+  // ---------------------------------------------------------------------------------//
+  {
+    for (StackTraceElement ste : java.lang.Thread.currentThread ().getStackTrace ())
+      System.out.println (ste);
+  }
+
   // ---------------------------------------------------------------------------------//
   static int getLong (byte[] buffer, int ptr)
   // ---------------------------------------------------------------------------------//