diff --git a/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapController.java b/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapController.java
index c45c6d0..743b215 100644
--- a/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapController.java
+++ b/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapController.java
@@ -18,6 +18,7 @@ package eu.omp.irap.vespa.epntapclient;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import eu.omp.irap.vespa.epntapclient.service.Queries;
@@ -25,6 +26,7 @@ import eu.omp.irap.vespa.epntapclient.service.ServiceCore;
 import eu.omp.irap.vespa.votable.Consts;
 import eu.omp.irap.vespa.votable.controller.CantGetVOTableException;
 import eu.omp.irap.vespa.votable.controller.VOTableController;
+import eu.omp.irap.vespa.votable.votabledata.VOTableData;
 
 /**
  * The main controller which manage views and controllers.
@@ -52,8 +54,22 @@ public class EpnTapController {
 	 * Method constructor, which initialize servicesController, resultsController and mainView.
 	 */
 	public EpnTapController() {
-		String query = String.format(Queries.SELECT_ALL_TAP_SERVICES_WHERE_CORE, ServiceCore.EPNCORE);
+		String query = String.format(Queries.SELECT_ALL_TAP_SERVICES_WHERE_CORE,
+				ServiceCore.EPNCORE);
 		servicesCtrl = new VOTableController(Consts.DEFAULT_REGISTRY_URL, query);
+		VOTableData data = servicesCtrl.getVOTableData();
+	}
+
+	public void readServices() {
+		try {
+			servicesCtrl.readTable();
+		} catch (CantGetVOTableException e) {
+			displayError(e);
+		}
+	}
+
+	public void displayError(Exception e) {
+		logger.log(Level.SEVERE, "Can not get services.", e);
 	}
 
 	public String sendQuery(String query, String tableServiceURL)
diff --git a/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapMainApp.java b/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapMainApp.java
index 9cf1c71..cd9931e 100644
--- a/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapMainApp.java
+++ b/src/main/java/eu/omp/irap/vespa/epntapclient/EpnTapMainApp.java
@@ -55,8 +55,9 @@ public class EpnTapMainApp {
 			return;
 		}
 
-		GUIController ctrl = new GUIController();
-		SwingUtilities.invokeLater(EpnTapMainApp.run(ctrl.getView(), "EPN-TAP client"));
+		GUIController guiCtrl = new GUIController();
+		guiCtrl.readServices();
+		SwingUtilities.invokeLater(EpnTapMainApp.run(guiCtrl.getView(), "EPN-TAP client"));
 	}
 
 	private static Runnable run(final EpnTapMainView voTableView, final String title) {
diff --git a/src/main/java/eu/omp/irap/vespa/epntapclient/gui/GUIController.java b/src/main/java/eu/omp/irap/vespa/epntapclient/gui/GUIController.java
index 1b942d7..82879d0 100644
--- a/src/main/java/eu/omp/irap/vespa/epntapclient/gui/GUIController.java
+++ b/src/main/java/eu/omp/irap/vespa/epntapclient/gui/GUIController.java
@@ -23,6 +23,8 @@ import java.nio.file.Paths;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import javax.swing.JOptionPane;
+
 import eu.omp.irap.vespa.epntapclient.EpnTapController;
 import eu.omp.irap.vespa.epntapclient.service.Queries;
 import eu.omp.irap.vespa.votable.controller.CantGetVOTableException;
@@ -49,6 +51,15 @@ public class GUIController extends EpnTapController implements ViewListener {
 	public GUIController() {
 		super();
 		mainView = new EpnTapMainView(this);
+	}
+
+	@Override
+	public void readServices() {
+		try {
+			servicesCtrl.readTable();
+		} catch (CantGetVOTableException e) {
+			displayError(e);
+		}
 		mainView.getServicesPanel().fillTable(servicesCtrl.getVOTableData());
 	}
 
@@ -59,8 +70,9 @@ public class GUIController extends EpnTapController implements ViewListener {
 	/** Update the row selected by the user on the Services Panel. */
 	@Override
 	public void onServiceSelected(int selectedServiceRow) {
-		mainView.getServicesPanel().getServiceURL(selectedServiceRow);
-		mainView.getServicesPanel().getTableName(selectedServiceRow);
+		String url = mainView.getServicesPanel().getServiceURL(selectedServiceRow);
+		String tableName = mainView.getServicesPanel().getTableName(selectedServiceRow);
+		updateService(url, tableName);
 	}
 
 	/** Send the specified query on selectedTableServiceURL */
@@ -76,6 +88,12 @@ public class GUIController extends EpnTapController implements ViewListener {
 		}
 	}
 
+	@Override
+	public void displayError(Exception e) {
+		JOptionPane.showMessageDialog(mainView, "Error", e.getMessage(), JOptionPane.ERROR_MESSAGE,
+				null);
+	}
+
 	/** Copy the VOTable to a specified location. */
 	@Override
 	public void onDownloadButtonClicked(File outputFile) {
@@ -92,7 +110,7 @@ public class GUIController extends EpnTapController implements ViewListener {
 	/** Update a query parameter in the parameter list. */
 	@Override
 	public void onParameterChanged(String paramName, Object paramValue) {
-		updateParameter(paramName, paramName);
+		updateParameter(paramName, paramValue);
 		updateQueryArea();
 		GUIController.logger.info("uploaded " + paramName + ": " + paramValue);
 	}
--
libgit2 0.21.2