diff --git a/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageStatusComp.java b/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageStatusComp.java
index e3420544f5..c0e22e25d8 100644
--- a/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageStatusComp.java
+++ b/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageStatusComp.java
@@ -69,6 +69,7 @@ import com.raytheon.viz.avncommon.AvnMessageMgr.StatusMessageType;
  *    8/11/2008    1314        grichard    Used PathManager for pathnames.
  *    10/04/2012   1229        rferrel     Added dispose check needed for 
  *                                          non-blocking dialogs.
+ *    10/12/2012   1229        rferrel     Changes for non-blocking MessageViewerDlg.
  * 
  * </pre>
  * 
@@ -423,12 +424,12 @@ public class MessageStatusComp extends Composite implements IStatusSettable {
      * Create the message viewer dialog.
      */
     private void createMessageViewerDialog() {
-        if (msgViewerDlg == null || msgViewerDlg.getShell().isDisposed()) {
+        if (msgViewerDlg == null || msgViewerDlg.getShell() == null
+                || msgViewerDlg.isDisposed()) {
             msgViewerDlg = new MessageViewerDlg(this, msgType);
             msgViewerDlg.open();
-            msgViewerDlg = null;
         } else {
-            msgViewerDlg.showDialog();
+            msgViewerDlg.bringToTop();
         }
     }
 
diff --git a/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageViewerDlg.java b/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageViewerDlg.java
index 49030af359..ff9d6d22f3 100755
--- a/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageViewerDlg.java
+++ b/cave/com.raytheon.viz.avnconfig/src/com/raytheon/viz/avnconfig/MessageViewerDlg.java
@@ -47,6 +47,7 @@ import com.raytheon.viz.ui.dialogs.CaveSWTDialog;
  * 28 FEB 2008  938        lvenable    Initial creation.
  * 4/8/2008     934        grichard    Added IStatusViewable interface.
  * 9/12/2008    1444       grichard    Accommodate separate message logs.
+ * 10/12/2012   1229       rferrel     Make dialog non-blocking.
  * 
  * </pre>
  * 
@@ -81,7 +82,7 @@ public class MessageViewerDlg extends CaveSWTDialog {
      */
     public MessageViewerDlg(Composite parent, StatusMessageType msgType) {
         super(parent.getShell(), SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MODELESS,
-                CAVE.PERSPECTIVE_INDEPENDENT);
+                CAVE.PERSPECTIVE_INDEPENDENT | CAVE.DO_NOT_BLOCK);
         setText("Message Log");
 
         this.msgType = msgType;
@@ -178,16 +179,4 @@ public class MessageViewerDlg extends CaveSWTDialog {
         }
         msgList.setSelection(0);
     }
-
-    /**
-     * Show the dialog.
-     */
-    public void showDialog() {
-
-        if (shell.isVisible() == false) {
-            shell.setVisible(true);
-        }
-
-        shell.setActive();
-    }
 }