diff --git a/.classpath b/.classpath
index 765cbde..bcf3f70 100644
--- a/.classpath
+++ b/.classpath
@@ -22,16 +22,17 @@
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
+	<classpathentry kind="con" path="com.google.gwt.eclipse.core.GWT_CONTAINER"/>
 	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 			<attribute name="org.eclipse.jst.component.nondependency" value=""/>
 		</attributes>
 	</classpathentry>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7">
+		<attributes>
+			<attribute name="owner.project.facets" value="java"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="target/tabular-data-sdmx-export-widget-1.0.0-SNAPSHOT/WEB-INF/classes"/>
 </classpath>
diff --git a/.project b/.project
index 96eb2f8..1637576 100644
--- a/.project
+++ b/.project
@@ -20,6 +20,16 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>com.google.gdt.eclipse.core.webAppProjectValidator</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>com.google.gwt.eclipse.core.gwtProjectValidator</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 		<buildCommand>
 			<name>org.eclipse.m2e.core.maven2Builder</name>
 			<arguments>
@@ -32,5 +42,6 @@
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
+		<nature>com.google.gwt.eclipse.core.gwtNature</nature>
 	</natures>
 </projectDescription>
diff --git a/.settings/com.google.appengine.eclipse.core.prefs b/.settings/com.google.appengine.eclipse.core.prefs
new file mode 100644
index 0000000..5260f5f
--- /dev/null
+++ b/.settings/com.google.appengine.eclipse.core.prefs
@@ -0,0 +1,4 @@
+eclipse.preferences.version=1
+filesCopiedToWebInfLib=
+googleCloudSqlEnabled=false
+localDevMySqlEnabled=true
diff --git a/.settings/com.google.gwt.eclipse.core.prefs b/.settings/com.google.gwt.eclipse.core.prefs
new file mode 100644
index 0000000..f23a752
--- /dev/null
+++ b/.settings/com.google.gwt.eclipse.core.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+entryPointModules=
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index 8ad6fb0..443e085 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -1,8 +1,8 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
-org.eclipse.jdt.core.compiler.compliance=1.5
+org.eclipse.jdt.core.compiler.compliance=1.7
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
-org.eclipse.jdt.core.compiler.source=1.5
+org.eclipse.jdt.core.compiler.source=1.7
diff --git a/.settings/org.eclipse.wst.common.project.facet.core.xml b/.settings/org.eclipse.wst.common.project.facet.core.xml
index a50949e..4f92af5 100644
--- a/.settings/org.eclipse.wst.common.project.facet.core.xml
+++ b/.settings/org.eclipse.wst.common.project.facet.core.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <faceted-project>
   <installed facet="jst.utility" version="1.0"/>
-  <installed facet="java" version="1.5"/>
+  <installed facet="java" version="1.7"/>
 </faceted-project>
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 b2f4e45..fc999c8 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
@@ -18,9 +18,12 @@ 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.ProgressBar;
+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.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;
 
 
 
@@ -161,7 +164,13 @@ SDMXExportProgressListener {
 
 	public void operationFailed(Throwable caught, String reason,
 			String failureDetails) {
+		AlertMessageBox d = new AlertMessageBox("Error in SDMX Export", reason);
+		d.addHideHandler(new HideHandler() {
+			public void onHide(HideEvent event) {
+			}
 
+		});
+		d.show();
 	}
 
 }
diff --git a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/progress/SDMXExportProgressUpdater.java b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/progress/SDMXExportProgressUpdater.java
index 1ade08f..005030d 100644
--- a/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/progress/SDMXExportProgressUpdater.java
+++ b/src/main/java/org/gcube/portlets/user/td/sdmxexportwidget/client/progress/SDMXExportProgressUpdater.java
@@ -104,15 +104,7 @@ public class SDMXExportProgressUpdater extends Timer {
 		}
 		fireOperationFailed(th, failure, details);
 
-		AlertMessageBox d = new AlertMessageBox("Error in SDMX Export", details);
-		d.addHideHandler(new HideHandler() {
-
-			public void onHide(HideEvent event) {
-				//
-			}
-
-		});
-		d.show();
+		
 
 	}