Index: src/libchcore/TSubTaskCopyMove.cpp
===================================================================
diff -u -N -ra476ced2f2235ee21c69176e88eba1cf7aea861f -rc66b22f786f8434075a09e92de52bba8a53a85db
--- src/libchcore/TSubTaskCopyMove.cpp	(.../TSubTaskCopyMove.cpp)	(revision a476ced2f2235ee21c69176e88eba1cf7aea861f)
+++ src/libchcore/TSubTaskCopyMove.cpp	(.../TSubTaskCopyMove.cpp)	(revision c66b22f786f8434075a09e92de52bba8a53a85db)
@@ -90,9 +90,13 @@
 
 	// initialize stats if not resuming (when resuming we have already initialized
 	// the stats once - it is being restored in Load() too).
-	if(!m_tSubTaskStats.IsInitialized())
-	{
+	if (!m_tSubTaskStats.IsInitialized())
 		m_tSubTaskStats.Init(TBufferSizes::eBuffer_Default, rFilesCache.GetSize(), 0, rFilesCache.CalculateTotalSize(), rFilesCache.CalculatePartialSize(m_tSubTaskStats.GetCurrentIndex()), TString());
+	else
+	{
+		_ASSERTE(rFilesCache.GetSize() == m_tSubTaskStats.GetTotalCount());
+		if (rFilesCache.GetSize() != m_tSubTaskStats.GetTotalCount())
+			THROW_CORE_EXCEPTION(eErr_InternalProblem);
 	}
 
 	// now it's time to check if there is enough space on destination device
Index: src/libchcore/TSubTaskStatsInfo.cpp
===================================================================
diff -u -N -ra476ced2f2235ee21c69176e88eba1cf7aea861f -rc66b22f786f8434075a09e92de52bba8a53a85db
--- src/libchcore/TSubTaskStatsInfo.cpp	(.../TSubTaskStatsInfo.cpp)	(revision a476ced2f2235ee21c69176e88eba1cf7aea861f)
+++ src/libchcore/TSubTaskStatsInfo.cpp	(.../TSubTaskStatsInfo.cpp)	(revision c66b22f786f8434075a09e92de52bba8a53a85db)
@@ -148,6 +148,12 @@
 		THROW_CORE_EXCEPTION(eErr_InternalProblem);
 }
 
+chcore::file_count_t TSubTaskStatsInfo::GetTotalCount() const
+{
+	boost::shared_lock<boost::shared_mutex> lock(m_lock);
+	return m_fcTotalCount;
+}
+
 void TSubTaskStatsInfo::IncreaseProcessedSize(unsigned long long ullIncreaseBy)
 {
 	boost::unique_lock<boost::shared_mutex> lock(m_lock);
Index: src/libchcore/TSubTaskStatsInfo.h
===================================================================
diff -u -N -ra476ced2f2235ee21c69176e88eba1cf7aea861f -rc66b22f786f8434075a09e92de52bba8a53a85db
--- src/libchcore/TSubTaskStatsInfo.h	(.../TSubTaskStatsInfo.h)	(revision a476ced2f2235ee21c69176e88eba1cf7aea861f)
+++ src/libchcore/TSubTaskStatsInfo.h	(.../TSubTaskStatsInfo.h)	(revision c66b22f786f8434075a09e92de52bba8a53a85db)
@@ -62,6 +62,7 @@
 	void SetProcessedCount(file_count_t fcIndex);
 
 	void SetTotalCount(file_count_t fcCount);
+	file_count_t GetTotalCount() const;
 
 	// size stats
 	void IncreaseProcessedSize(unsigned long long ullIncreaseBy);
Index: src/libchcore/TTask.cpp
===================================================================
diff -u -N -r3045f3bb4e1fd76ea1fd3cd61d2fa8bf49771436 -rc66b22f786f8434075a09e92de52bba8a53a85db
--- src/libchcore/TTask.cpp	(.../TTask.cpp)	(revision 3045f3bb4e1fd76ea1fd3cd61d2fa8bf49771436)
+++ src/libchcore/TTask.cpp	(.../TTask.cpp)	(revision c66b22f786f8434075a09e92de52bba8a53a85db)
@@ -188,10 +188,7 @@
 		try
 		{
 			if(bLogPathLoaded)
-			{
-				m_log.init(m_tBaseData.GetLogPath().ToString(), 262144, icpf::log_file::level_debug, false, false);
-				m_log.loge(szErr);
-			}
+				GetLog().loge(szErr);
 		}
 		catch(const std::exception&)
 		{
@@ -252,6 +249,8 @@
 
 void TTask::BeginProcessing()
 {
+	GetLog().logi(_T("Requested task to begin processing"));
+
 	boost::unique_lock<boost::shared_mutex> lock(m_lock);
 	if(m_tBaseData.GetCurrentState() != eTaskState_LoadError)
 		m_workerThread.StartThread(DelegateThreadProc, this, GetTaskPropValue<eTO_ThreadPriority>(m_tConfiguration));
@@ -262,6 +261,7 @@
 	// the same as retry but less demanding
 	if(GetTaskState() == eTaskState_Paused)
 	{
+		GetLog().logi(_T("Requested task resume"));
 		SetTaskState(eTaskState_Processing);
 		BeginProcessing();
 	}
@@ -286,6 +286,7 @@
 
 void TTask::RestartProcessing()
 {
+	GetLog().logi(_T("Requested task restart"));
 	KillThread();
 
 	SetTaskState(eTaskState_None);
@@ -301,6 +302,7 @@
 {
 	if(GetTaskState() != eTaskState_Finished && GetTaskState() != eTaskState_Cancelled)
 	{
+		GetLog().logi(_T("Requested task pause"));
 		KillThread();
 		SetTaskState(eTaskState_Paused);
 	}
@@ -311,6 +313,7 @@
 	// change to ST_CANCELLED
 	if(GetTaskState() != eTaskState_Finished)
 	{
+		GetLog().logi(_T("Requested task cancel"));
 		KillThread();
 		SetTaskState(eTaskState_Cancelled);
 	}
@@ -443,9 +446,9 @@
 
 			//			return; // skips sleep and kill flag checking
 		}
+		else
+			Sleep(50);	// not to make it too hard for processor
 
-		Sleep(50);	// not to make it too hard for processor
-
 		if(m_workerThread.KillRequested())
 		{
 			// log
@@ -649,4 +652,12 @@
 	return m_spSerializer;
 }
 
+icpf::log_file& TTask::GetLog()
+{
+	if (!m_log.is_initialized())
+		m_log.init(m_tBaseData.GetLogPath().ToString(), 262144, icpf::log_file::level_debug, false, false);
+
+	return m_log;
+}
+
 END_CHCORE_NAMESPACE
Index: src/libchcore/TTask.h
===================================================================
diff -u -N -r7d59ab9183c933f2fc2682a95fb5d26cf2f952d7 -rc66b22f786f8434075a09e92de52bba8a53a85db
--- src/libchcore/TTask.h	(.../TTask.h)	(revision 7d59ab9183c933f2fc2682a95fb5d26cf2f952d7)
+++ src/libchcore/TTask.h	(.../TTask.h)	(revision c66b22f786f8434075a09e92de52bba8a53a85db)
@@ -84,7 +84,9 @@
 	void SetTaskDefinition(const TTaskDefinition& rTaskDefinition);
 
 	void SetLogPath(const TSmartPath& pathLog);
+	icpf::log_file& GetLog();
 
+
 	// methods are called when task is being added or removed from the global task array
 	/// Method is called when this task is being added to a TTaskManager object
 	void OnRegisterTask();