diff --git a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXExportWizardTD.java b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXExportWizardTD.java
index 7a0c00b..ee65cf3 100644
--- a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXExportWizardTD.java
+++ b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXExportWizardTD.java
@@ -1,8 +1,12 @@
 package org.gcube.portlets.user.td.sdmxexportwidget.client;
 
 import org.gcube.portlets.user.td.gwtservice.client.rpc.TDGWTServiceAsync;
+import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTIsLockedException;
+import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTSessionExpiredException;
 import org.gcube.portlets.user.td.gwtservice.shared.sdmx.SDMXExportSession;
 import org.gcube.portlets.user.td.gwtservice.shared.tr.TabResource;
+import org.gcube.portlets.user.td.widgetcommonevent.client.event.SessionExpiredEvent;
+import org.gcube.portlets.user.td.widgetcommonevent.client.type.SessionExpiredType;
 import org.gcube.portlets.user.td.wizardwidget.client.WizardWindow;
 
 import com.allen_sauer.gwt.log.client.Log;
@@ -21,43 +25,55 @@ import com.sencha.gxt.widget.core.client.box.AutoProgressMessageBox;
 public class SDMXExportWizardTD extends WizardWindow {
 
 	protected SDMXExportSession exportSession;
-
+	
 	/**
 	 * The id of the {@link CSVTarget} to use.
 	 * 
 	 * @param targetId
 	 */
 
-	public SDMXExportWizardTD(String title,EventBus eventBus) {
-		super(title,eventBus);
+	public SDMXExportWizardTD(String title, final EventBus eventBus) {
+		super(title, eventBus);
 		setWidth(550);
 		setHeight(520);
-		
-		
+
 		exportSession = new SDMXExportSession();
-		
-		final AutoProgressMessageBox box = new AutoProgressMessageBox("Wait", "Retrive Tabular Resource Information, please wait...");
-	    box.setProgressText("Retrieving...");
-	    box.auto();
-	    box.show();
-	    
+
+		final AutoProgressMessageBox box = new AutoProgressMessageBox("Wait",
+				"Retrive Tabular Resource Information, please wait...");
+		box.setProgressText("Retrieving...");
+		box.auto();
+		box.show();
+
 		TDGWTServiceAsync.INSTANCE
 				.getTabResourceInformation(new AsyncCallback<TabResource>() {
 
-					
 					public void onFailure(Throwable caught) {
-						Log.error("No Tabular Resource Information retrived from server "
-								+ caught.getLocalizedMessage());
-						box.hide();
-						fireFailed(caught, "Error retrieving tabular resource information: "+ caught.getLocalizedMessage(), caught.toString());
-						close(false);
+						if (caught instanceof TDGWTSessionExpiredException) {
+							eventBus.fireEvent(new SessionExpiredEvent(
+									SessionExpiredType.EXPIREDONSERVER));
+						} else {
+							if (caught instanceof TDGWTIsLockedException) {
+								Log.error(caught.getLocalizedMessage());
+								showErrorAndHide("Error Locked",
+										caught.getLocalizedMessage(), caught);
+							} else {
+								Log.error("No Tabular Resource Information retrived from server "
+										+ caught.getLocalizedMessage());
+								box.hide();
+								showErrorAndHide("Error",
+										"Error retrieving tabular resource information: "
+												+ caught.getLocalizedMessage(),
+										caught);
+							}
+						}
 					}
 
 					public void onSuccess(TabResource result) {
 						Log.debug("Tabular Resource Information retrived");
 						exportSession.setTabResource(result);
 						box.hide();
-						
+
 					}
 				});
 
diff --git a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXOperationInProgressCard.java b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXOperationInProgressCard.java
index 13b0482..41d263f 100644
--- a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXOperationInProgressCard.java
+++ b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXOperationInProgressCard.java
@@ -4,6 +4,7 @@
 package org.gcube.portlets.user.td.sdmxexportwidget.client;
 
 import org.gcube.portlets.user.td.gwtservice.client.rpc.TDGWTServiceAsync;
+import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTIsLockedException;
 import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTSessionExpiredException;
 import org.gcube.portlets.user.td.gwtservice.shared.sdmx.SDMXExportSession;
 import org.gcube.portlets.user.td.monitorwidget.client.MonitorDialog;
@@ -20,13 +21,10 @@ import com.google.gwt.user.client.rpc.AsyncCallback;
 import com.google.gwt.user.client.ui.FlexTable;
 import com.sencha.gxt.core.client.util.Margins;
 import com.sencha.gxt.widget.core.client.FramedPanel;
-import com.sencha.gxt.widget.core.client.box.AlertMessageBox;
 import com.sencha.gxt.widget.core.client.container.BoxLayoutContainer.BoxLayoutData;
 import com.sencha.gxt.widget.core.client.container.HtmlLayoutContainer;
 import com.sencha.gxt.widget.core.client.container.VBoxLayoutContainer;
 import com.sencha.gxt.widget.core.client.container.VBoxLayoutContainer.VBoxLayoutAlign;
-import com.sencha.gxt.widget.core.client.event.HideEvent;
-import com.sencha.gxt.widget.core.client.event.HideEvent.HideHandler;
 
 /**
  * 
@@ -120,12 +118,16 @@ public class SDMXOperationInProgressCard extends WizardCard implements
 											new SessionExpiredEvent(
 													SessionExpiredType.EXPIREDONSERVER));
 						} else {
-
-							showErrorAndHide(
-									"Error in exportSDMX",
-									"An error occured in exportSDMX: "
-											+ caught.getLocalizedMessage(),
-									caught.getStackTrace().toString(), caught);
+							if (caught instanceof TDGWTIsLockedException) {
+								Log.error(caught.getLocalizedMessage());
+								showErrorAndHide("Error Locked",
+										caught.getLocalizedMessage(), caught);
+							} else {
+								showErrorAndHide("Error in exportSDMX",
+										"An error occured in exportSDMX: "
+												+ caught.getLocalizedMessage(),
+										caught);
+							}
 						}
 					}
 				});
@@ -191,13 +193,8 @@ public class SDMXOperationInProgressCard extends WizardCard implements
 							new SessionExpiredEvent(
 									SessionExpiredType.EXPIREDONSERVER));
 		} else {
-			AlertMessageBox d = new AlertMessageBox("Error in SDMX Export",
-					reason);
-			d.addHideHandler(new HideHandler() {
-				public void onHide(HideEvent event) {
-				}
-			});
-			d.show();
+			showErrorAndHide("Error in SDMX Export",
+					reason,caught);
 		}
 		forceLayout();
 	}
@@ -279,7 +276,7 @@ public class SDMXOperationInProgressCard extends WizardCard implements
 					Log.info("fire Operation In Background");
 
 					getWizardWindow().firePutInBackground();
-					
+
 				} catch (Exception e) {
 					Log.error("fire Operation In Background :"
 							+ e.getLocalizedMessage());
diff --git a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXRegistrySelectionCard.java b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXRegistrySelectionCard.java
index fb12855..0989643 100644
--- a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXRegistrySelectionCard.java
+++ b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/SDMXRegistrySelectionCard.java
@@ -156,8 +156,10 @@ public class SDMXRegistrySelectionCard extends WizardCard {
 															new SessionExpiredEvent(
 																	SessionExpiredType.EXPIREDONSERVER));
 										} else {	
-										Log.error("SDMXRegistrySource do not stored "
+											Log.error("SDMXRegistrySource do not stored "
 												+ caught.getLocalizedMessage());
+											showErrorAndHide("Error", "SDMXRegistrySource do not stored "
+													+ caught.getLocalizedMessage(), caught);
 										}
 									}