diff --git a/pglab/QueryTool.cpp b/pglab/QueryTool.cpp
index f18a1ee..06ca55c 100644
--- a/pglab/QueryTool.cpp
+++ b/pglab/QueryTool.cpp
@@ -164,10 +164,20 @@ void QueryTool::execute()
 			}
 		};
 
-        if (m_queryParamListController->empty())
-			m_dbConnection.send(cmd, cb);
-        else 
-			m_dbConnection.send(cmd, m_queryParamListController->params(), cb);
+		try {
+			if (m_queryParamListController->empty())
+				m_dbConnection.send(cmd, cb);
+			else
+				m_dbConnection.send(cmd, m_queryParamListController->params(), cb);
+		}
+		catch (const std::exception &ex) {
+			QMessageBox msgBox;
+			msgBox.setIcon(QMessageBox::Critical);
+			msgBox.setText(QString("Error executing query: %1").arg(QString::fromUtf8(ex.what())));
+			msgBox.setStandardButtons(QMessageBox::Close);
+			msgBox.setDefaultButton(QMessageBox::Close);
+			msgBox.exec();
+		}
 	}
 }