diff --git a/trunk/PlanosActuacao/src/java/utils/Utils.java b/trunk/PlanosActuacao/src/java/utils/Utils.java
index e4638b55..5772973d 100644
--- a/trunk/PlanosActuacao/src/java/utils/Utils.java
+++ b/trunk/PlanosActuacao/src/java/utils/Utils.java
@@ -122,7 +122,15 @@ public class Utils {
 		if ( mapData != null )
 		{
 			HttpSession aatSession = ( HttpSession ) mapData.get( "session" );
-			aatSession.invalidate();
+			try
+			{
+				aatSession.invalidate();
+			}
+			catch ( IllegalStateException e )
+			{
+//				ErrorLogger.logException( e );
+				System.out.println( "Session already invalidated." );
+			}
 		}
 	}