diff --git a/src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ColumnFilterDialog.java b/src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ColumnFilterDialog.java
index 486291a..d111dd0 100644
--- a/src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ColumnFilterDialog.java
+++ b/src/main/java/org/gcube/portlets/user/td/expressionwidget/client/ColumnFilterDialog.java
@@ -20,12 +20,11 @@ import com.sencha.gxt.widget.core.client.Window;
 import com.sencha.gxt.widget.core.client.event.SelectEvent;
 import com.sencha.gxt.widget.core.client.event.SelectEvent.SelectHandler;
 
-
 /**
  * 
- * @author "Giancarlo Panichi" 
- * <a href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a> 
- *
+ * @author "Giancarlo Panichi" <a
+ *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
+ * 
  */
 public class ColumnFilterDialog extends Window {
 	protected String WIDTH = "660px";
@@ -70,7 +69,7 @@ public class ColumnFilterDialog extends Window {
 		getHeader().setIcon(ExpressionResources.INSTANCE.filter());
 
 	}
-	
+
 	/**
 	 * {@inheritDoc}
 	 */
@@ -80,7 +79,6 @@ public class ColumnFilterDialog extends Window {
 
 		closeBtn.addSelectHandler(new SelectHandler() {
 
-			
 			public void onSelect(SelectEvent event) {
 				close();
 			}
@@ -104,7 +102,7 @@ public class ColumnFilterDialog extends Window {
 			columnExpressionPanel = new ColumnExpressionPanel(this, column,
 					eventBus);
 			add(columnExpressionPanel);
-			
+
 		} else {
 			HTML errorMessage = new HTML(
 					"This type of column is not supported for now!");
@@ -139,13 +137,20 @@ public class ColumnFilterDialog extends Window {
 					public void onFailure(Throwable caught) {
 						Log.error("Error retrieving column: "
 								+ caught.getMessage());
-						UtilsGXT3.alert("Error retrieving column", caught.getMessage());
+						UtilsGXT3.alert("Error retrieving column",
+								caught.getMessage());
 					}
 
 					public void onSuccess(ColumnData result) {
 						Log.debug("Retrived column: " + result);
-						column = result;
-						create();
+						if (result.isViewColumn()) {
+							UtilsGXT3.info("View Column",
+									"You can not make expressions on view column for now");
+							hide();
+						} else {
+							column = result;
+							create();
+						}
 					}
 
 				});
@@ -155,7 +160,7 @@ public class ColumnFilterDialog extends Window {
 	protected void callApplyFilter() {
 		columnFilterSession = new ColumnFilterSession(column, exp);
 		Log.debug(columnFilterSession.toString());
-		
+
 		ExpressionServiceAsync.INSTANCE.submitColumnFilter(columnFilterSession,
 				new AsyncCallback<Void>() {
 
@@ -168,10 +173,10 @@ public class ColumnFilterDialog extends Window {
 					@Override
 					public void onFailure(Throwable caught) {
 						Log.error("Error submitting the column filter: "
-								+ caught.getMessage()+ " "+caught.getCause());
+								+ caught.getMessage() + " " + caught.getCause());
 						caught.printStackTrace();
-						UtilsGXT3.alert("Error submitting the column filter", caught
-										.getMessage());
+						UtilsGXT3.alert("Error submitting the column filter",
+								caught.getMessage());
 
 					}
 				});
@@ -182,6 +187,5 @@ public class ColumnFilterDialog extends Window {
 		dialog = new ColumnFilterProgressDialog(this, eventBus);
 		dialog.show();
 	}
-	
-	
+
 }