diff --git a/ZoomPipeline_FuncSvr/zpmainframe.cpp b/ZoomPipeline_FuncSvr/zpmainframe.cpp
index c839dfa4fc1ff0d7cc27c826f16b3e2f9898e1ac..ce9d51ea20a4a790b81772e9bce2a53f5ad9fdf9 100644
--- a/ZoomPipeline_FuncSvr/zpmainframe.cpp
+++ b/ZoomPipeline_FuncSvr/zpmainframe.cpp
@@ -123,7 +123,8 @@ void ZPMainFrame::changeEvent(QEvent *e)
 		if (this->isMinimized()==true)
 		{
 			this->hide();
-			this->m_IconTray->showMessage(tr("Server still running"),
+			if  (m_IconTray)
+				this->m_IconTray->showMessage(tr("Server still running"),
 										  tr("If you want to terminate server, just using exit Toolbar button."));
 		}
 		break;
@@ -384,12 +385,15 @@ void  ZPMainFrame::timerEvent(QTimerEvent * e)
 			static int ppIc = 0;
 			lastRecieved = g_bytesRecieved;
 			lastSent = g_bytesSent;
-			if (++ppIc % 2==0)
-				m_IconTray->setIcon(QIcon(":/icons/Resources/Color Classic Green.png"));
-			else
-				m_IconTray->setIcon(QIcon(":/icons/Resources/Color Classic, Performa 250, 275.png"));
+			if  (m_IconTray)
+			{
+				if (++ppIc % 2==0)
+					m_IconTray->setIcon(QIcon(":/icons/Resources/Color Classic Green.png"));
+				else
+					m_IconTray->setIcon(QIcon(":/icons/Resources/Color Classic, Performa 250, 275.png"));
+			}
 		}
-		else
+		else if (m_IconTray)
 		{
 			m_IconTray->setIcon(QIcon(":/icons/Resources/Color Classic.png"));
 		}
@@ -974,21 +978,27 @@ void  ZPMainFrame::closeEvent(QCloseEvent * e)
 	if (this->isVisible()==true)
 	{
 		this->hide();
-		this->m_IconTray->showMessage(tr("Server still running"),
+		if (m_IconTray)
+			this->m_IconTray->showMessage(tr("Server still running"),
 									  tr("If you want to terminate server, just using exit Toolbar button."));
 		e->ignore();
 	}
 	else
 	{
-		e->accept();
-		this->m_IconTray->showMessage(tr("Server is  going to closed"),
+		if (m_IconTray)
+			this->m_IconTray->showMessage(tr("Server is  going to closed"),
 									  tr("Waiting for all unfinished progress..."));
+		e->accept();
+		m_IconTray->deleteLater();
+		m_IconTray = nullptr;
 	}
 }
 
 void ZPMainFrame::on_actionExit_triggered()
 {
 	this->hide();
-	this->m_IconTray->setContextMenu(0);
+	if (m_IconTray)
+		this->m_IconTray->setContextMenu(0);
 	this->close();
+
 }