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 4146c83..8de927d 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
@@ -7896,10 +7896,10 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 	}
 
 	// TODO
-	public void startSplitColumn(SplitColumnSession splitColumnSession)
+	public void startSplitColumn(SplitColumnSession splitColumnSession, HttpSession session)
 			throws TDGWTServiceException {
 		try {
-			HttpSession session = this.getThreadLocalRequest().getSession();
+			//HttpSession session = this.getThreadLocalRequest().getSession();
 			SessionUtil.setSplitColumnSession(session, splitColumnSession);
 			ASLSession aslSession = SessionUtil.getAslSession(session);
 			if (splitColumnSession == null) {
@@ -8041,10 +8041,10 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 	}
 
 	// TODO
-	public void startMergeColumn(MergeColumnSession mergeColumnSession)
+	public void startMergeColumn(MergeColumnSession mergeColumnSession, HttpSession session)
 			throws TDGWTServiceException {
 		try {
-			HttpSession session = this.getThreadLocalRequest().getSession();
+			//HttpSession session = this.getThreadLocalRequest().getSession();
 			SessionUtil.setMergeColumnSession(session, mergeColumnSession);
 			ASLSession aslSession = SessionUtil.getAslSession(session);
 			if (mergeColumnSession == null) {