diff --git a/src/main/java/org/gcube/portlets/user/td/statisticalwidget/client/stat/TDSubmissionHandler.java b/src/main/java/org/gcube/portlets/user/td/statisticalwidget/client/stat/TDSubmissionHandler.java
index 179a222..20da885 100644
--- a/src/main/java/org/gcube/portlets/user/td/statisticalwidget/client/stat/TDSubmissionHandler.java
+++ b/src/main/java/org/gcube/portlets/user/td/statisticalwidget/client/stat/TDSubmissionHandler.java
@@ -34,12 +34,14 @@ public class TDSubmissionHandler implements ExternalExecutionEventHandler,
 	private EventBus eventBus;
 	private TRId trId;
 	private DataMinerWidget dataMinerWidget;
+	private boolean submitted;
 
 	public TDSubmissionHandler(DataMinerWidget dataMinerWidget, TRId trId,
 			EventBus eventBus) {
 		this.dataMinerWidget = dataMinerWidget;
 		this.trId = trId;
 		this.eventBus = eventBus;
+		submitted = false;
 	}
 
 	@Override
@@ -50,13 +52,17 @@ public class TDSubmissionHandler implements ExternalExecutionEventHandler,
 			UtilsGXT3.alert("Error", "Invalid params null");
 			return;
 		}
-		dataMinerWidget.closeDataMinerWidget();
 
-		DataMinerOperationSession statisticalOperationSession = new DataMinerOperationSession(
-				trId, event.getOp());
+		if (!submitted) {
+			Log.info("ExternalExecutionEvent submitted");
+			submitted=true;
+			dataMinerWidget.closeDataMinerWidget();
 
-		callDataMinerOperation(statisticalOperationSession);
+			DataMinerOperationSession statisticalOperationSession = new DataMinerOperationSession(
+					trId, event.getOp());
 
+			callDataMinerOperation(statisticalOperationSession);
+		}
 	}
 
 	protected void callDataMinerOperation(