diff --git a/src/main/java/org/gcube/portlets/user/workspace/client/AppController.java b/src/main/java/org/gcube/portlets/user/workspace/client/AppController.java
index eef6ca6..ab7b165 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/client/AppController.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/client/AppController.java
@@ -2094,7 +2094,8 @@ public class AppController implements SubscriberInterface {
 					@Override
 					public void onFailure(Throwable caught) {
 						fileVersioningEvent.getWinVersioning().unmask();
-						Window.alert("error:  "+caught);
+						//Window.alert("Error: "+caught.getMessage());
+						new MessageBoxAlert("Error", caught.getMessage(), null);
 
 					}