diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SessionUtil.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SessionUtil.java
index e11f704..bbc460d 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SessionUtil.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/SessionUtil.java
@@ -88,7 +88,7 @@ public class SessionUtil {
 				.getAttribute(ScopeHelper.USERNAME_ATTRIBUTE);
 		ASLSession session;
 		if (username == null) {
-			/*logger.warn("no user found in session, using test one");*/
+			logger.warn("no user found in session, use test user");
 			throw new TDGWTSessionExpiredException("Session Expired!");
 			/*
 			// Remove comment for Test
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
index 683fb59..b7bf4b0 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
@@ -5417,10 +5417,10 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 					aslSession.getUsername(), aslSession.getScope()));
 			TabularDataService service = TabularDataServiceFactory.getService();
 
-			checkTRId(filterColumnSession.getColumn().getTrId());
+			checkTRId(filterColumnSession.getTrId());
 
 			TabularResourceId tabularResourceId = new TabularResourceId(
-					Long.valueOf(filterColumnSession.getColumn().getTrId()
+					Long.valueOf(filterColumnSession.getTrId()
 							.getId()));
 			TabularResource tabularResource = service
 					.getTabularResource(tabularResourceId);
@@ -5445,8 +5445,7 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 			logger.debug("Filter Column on service: TaskId " + trTask.getId());
 
 			TaskWrapper taskWrapper = new TaskWrapper(trTask,
-					UIOperationsId.FilterColumn, filterColumnSession
-							.getColumn().getTrId());
+					UIOperationsId.FilterColumn, filterColumnSession.getTrId());
 			SessionUtil.setStartedTask(session, taskWrapper);
 			return trTask.getId().getValue();
 
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/FilterColumnSession.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/FilterColumnSession.java
index f116a56..2857f25 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/FilterColumnSession.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/tr/column/FilterColumnSession.java
@@ -2,48 +2,51 @@ package org.gcube.portlets.user.td.gwtservice.shared.tr.column;
 
 import java.io.Serializable;
 
+import org.gcube.portlets.user.td.widgetcommonevent.shared.TRId;
 import org.gcube.portlets.user.td.widgetcommonevent.shared.expression.C_Expression;
-import org.gcube.portlets.user.td.widgetcommonevent.shared.tr.column.ColumnData;
 
 /**
  * 
- * @author giancarlo
- * email: <a href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a> 
+ * @author giancarlo email: <a
+ *         href="mailto:g.panichi@isti.cnr.it">g.panichi@isti.cnr.it</a>
  *
  */
-public class FilterColumnSession implements Serializable{
-	
+public class FilterColumnSession implements Serializable {
+
 	private static final long serialVersionUID = -5362632291599472352L;
-	private ColumnData column;
+	private TRId trId;
 	private C_Expression cexpression;
-	
-	public FilterColumnSession(){
-		
+
+	public FilterColumnSession() {
+
 	}
-	
-	public FilterColumnSession(ColumnData column, C_Expression cexpression){
-		this.column=column;
-		this.cexpression=cexpression;
+
+	public FilterColumnSession(TRId trId, C_Expression cexpression) {
+		super();
+		this.trId = trId;
+		this.cexpression = cexpression;
 	}
-	
-	
-	public ColumnData getColumn() {
-		return column;
+
+	public TRId getTrId() {
+		return trId;
 	}
-	public void setColumn(ColumnData column) {
-		this.column = column;
+
+	public void setTrId(TRId trId) {
+		this.trId = trId;
 	}
+
 	public C_Expression getCexpression() {
 		return cexpression;
 	}
+
 	public void setCexpression(C_Expression cexpression) {
 		this.cexpression = cexpression;
 	}
-	
+
 	@Override
 	public String toString() {
-		return "ColumnFilterSession [column=" + column + ", cexpression="
+		return "FilterColumnSession [trId=" + trId + ", cexpression="
 				+ cexpression + "]";
 	}
-	
+
 }