removed long backtrace in error dialog

source/ArmarXGui/gui-plugins/StatechartEditorPlugin/view/dialogs/EditDefaultValueDialog.cpp

@@ -159,13 +159,13 @@ void EditDefaultValueDialog::onImportInternalJson()
         catch(VariantJsonException& ex)
         {
             QMessageBox msgBox;
-            msgBox.setText(QString("Error: ") + QString::fromStdString(ex.what()));
+            msgBox.setText(QString("Error: ") + QString::fromStdString(ex.getReason()));
             msgBox.exec();
         }
         catch(LocalException& ex)
         {
             QMessageBox msgBox;
-            msgBox.setText(QString("Error: ") + QString::fromStdString(ex.what()));
+            msgBox.setText(QString("Error: ") + QString::fromStdString(ex.getReason()));
             msgBox.exec();
         }
     }