--- OpenOpcUaCoreServer/include/VPIScheduler.h
+++ OpenOpcUaCoreServer/include/VPIScheduler.h
@@ -76,6 +76,7 @@
 			OpcUa_UInt32				m_uiSamplingInterval;
 			OpcUa_Boolean				m_bRunSchedulerThread;
 			OpcUa_Semaphore				m_hStopSchedulerThread;
+			OpcUa_Semaphore				m_hSchedulerThreadFinished;
 			OpcUa_Mutex					m_VpiReaderThreadMutex;
 			// Variable for the Writer thread
 			OpcUa_Boolean				m_bRunVpiWriterThread;