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 355d16c..c2bfe6e 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
@@ -17,6 +17,7 @@ import org.gcube.portal.custom.scopemanager.scopehelper.ScopeHelper;
 import org.gcube.portlets.user.td.gwtservice.server.file.CSVFileUploadSession;
 import org.gcube.portlets.user.td.gwtservice.server.file.CodelistMappingFileUploadSession;
 import org.gcube.portlets.user.td.gwtservice.server.trservice.TRTasksManager;
+import org.gcube.portlets.user.td.gwtservice.shared.Constants;
 import org.gcube.portlets.user.td.gwtservice.shared.codelisthelper.CodelistMappingSession;
 import org.gcube.portlets.user.td.gwtservice.shared.csv.CSVExportSession;
 import org.gcube.portlets.user.td.gwtservice.shared.csv.CSVImportSession;
@@ -75,17 +76,18 @@ public class SessionUtil {
 		ASLSession session;
 		if (username == null) {
 			logger.warn("no user found in session, using test one");
-			throw new TDGWTSessionExpiredException("Session Expired!");
+			/* throw new TDGWTSessionExpiredException("Session Expired!"); */
 
 			// Remove comment for Test
-			/*
-			 * username = Constants.DEFAULT_USER; String scope =
-			 * Constants.DEFAULT_SCOPE;
-			 * 
-			 * httpSession.setAttribute(ScopeHelper.USERNAME_ATTRIBUTE,
-			 * username); session = SessionManager.getInstance().getASLSession(
-			 * httpSession.getId(), username); session.setScope(scope);
-			 */
+
+			username = Constants.DEFAULT_USER;
+			String scope = Constants.DEFAULT_SCOPE;
+
+			httpSession.setAttribute(ScopeHelper.USERNAME_ATTRIBUTE, username);
+			session = SessionManager.getInstance().getASLSession(
+					httpSession.getId(), username);
+			session.setScope(scope);
+
 		} else {
 			session = SessionManager.getInstance().getASLSession(
 					httpSession.getId(), username);
@@ -603,7 +605,7 @@ public class SessionUtil {
 				deleteColumnSession);
 
 	}
-	
+
 	//
 
 	public static FilterColumnSession getFilterColumnSession(
@@ -1270,7 +1272,8 @@ public class SessionUtil {
 		if (tasksStarted == null) {
 			tasksStarted = new HashMap<String, TaskWrapper>();
 		} else {
-			httpSession.removeAttribute(SessionConstants.OPERATIONS_TASKS_STARTED);
+			httpSession
+					.removeAttribute(SessionConstants.OPERATIONS_TASKS_STARTED);
 		}
 		tasksStarted.put(taskWrapper.getTask().getId().getValue(), taskWrapper);
 		httpSession.setAttribute(SessionConstants.OPERATIONS_TASKS_STARTED,
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/monitor/OperationMonitorCreator.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/monitor/OperationMonitorCreator.java
index f03eaee..5bdc428 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/monitor/OperationMonitorCreator.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/monitor/OperationMonitorCreator.java
@@ -194,12 +194,11 @@ public class OperationMonitorCreator {
 		Table table;
 		ExportMetadata exportMetadata;
 
-		switch(taskWrapper.getOperationId()){
+		switch (taskWrapper.getOperationId()) {
 		case CSVExport:
 			table = taskWrapper.getTask().getResult().getPrimaryTable();
 			logger.debug("Table retrived: " + table.toString());
-			exportMetadata = table
-					.getMetadata(ExportMetadata.class);
+			exportMetadata = table.getMetadata(ExportMetadata.class);
 			logger.debug("ExportMetadata: " + exportMetadata);
 
 			operationMonitor.setTrId(SessionUtil.getTRId(session));
@@ -217,8 +216,7 @@ public class OperationMonitorCreator {
 		case SDMXExport:
 			table = taskWrapper.getTask().getResult().getPrimaryTable();
 			logger.debug("Table retrived: " + table.toString());
-			exportMetadata = table
-					.getMetadata(ExportMetadata.class);
+			exportMetadata = table.getMetadata(ExportMetadata.class);
 			logger.debug("ExportMetadata: " + exportMetadata);
 			operationMonitor.setTrId(SessionUtil.getTRId(session));
 			break;
@@ -229,13 +227,20 @@ public class OperationMonitorCreator {
 
 			operationMonitor.setTrId(trId);
 			tabResource = SessionUtil.getTabResource(session);
-			tabResource.setTrId(trId);
-			SessionUtil.setTabResource(session, tabResource);
+			logger.debug("CurrentTabResource :"+tabResource);
+			if (tabResource != null) {
+				tabResource.setTrId(trId);
+				SessionUtil.setTabResource(session, tabResource);
+			} else {
+				tabResource=new TabResource();
+				tabResource.setTrId(trId);
+				SessionUtil.setTabResource(session, tabResource);
+			}
 			SessionUtil.setTRId(session, trId);
 			break;
-		
+
 		}
-	
+
 	}
 
 	protected TRId retrieveTabularResourceBasicData(TRId trId)