error handling expert mode

NeoSuit/src/main/java/ui/expert/ApplyParallelisationPatternController.java

@@ -128,6 +128,24 @@ public class ApplyParallelisationPatternController extends ConnectedControl {
 					}
 				});
 
+				queryTask.setOnFailed(new EventHandler<WorkerStateEvent>() {
+					@Override
+					public void handle(final WorkerStateEvent workerStateEvent) {
+
+						updatePatternComboBox.setDisable(true);
+						transformButton.setDisable(true);
+						ObservableList<String> list = FXCollections.observableArrayList();
+						matchingPositionsList.set(list);
+						sequentialTextArea.setText("");
+						parallelizedTextArea.setText("");
+						Logger.exception(queryTask.exceptionProperty().get());
+						popup.close();
+						getApp().openPopup(ui.shared.MainApp.ERROR, true,
+								"Error when matching selected Candidate Pattern!");
+
+					}
+				});
+
 				new Thread(queryTask).start();
 
 			}
@@ -171,7 +189,11 @@ public class ApplyParallelisationPatternController extends ConnectedControl {
 						@Override
 						public void handle(final WorkerStateEvent workerStateEvent) {
 							updateTask.exceptionProperty().get().printStackTrace();
+							parallelizedTextArea.setText("");
+							transformButton.setDisable(true);
 							popup.close();
+							getApp().openPopup(ui.shared.MainApp.ERROR, true,
+									"Error when matching selected Parallelisation Pattern!");
 						}
 					});