diff --git a/dram/src/core/powerdown/PowerDownManagerBankwise.cpp b/dram/src/core/powerdown/PowerDownManagerBankwise.cpp
index 989bd4c3..98d7a89a 100644
--- a/dram/src/core/powerdown/PowerDownManagerBankwise.cpp
+++ b/dram/src/core/powerdown/PowerDownManagerBankwise.cpp
@@ -28,7 +28,7 @@ PowerDownManagerBankwise::PowerDownManagerBankwise(ControllerCore& controller) :
 
 void PowerDownManagerBankwise::sleep(Bank bank, sc_time time)
 {
-	if (!canSleep(bank))
+	if (!canSleep(bank) || isInPowerDown(bank))
 		return;
 
 	tlm_generic_payload& payload = powerDownPayloads[bank];
diff --git a/dram/src/core/refresh/RefreshManager.cpp b/dram/src/core/refresh/RefreshManager.cpp
index a9569f09..853cadc1 100644
--- a/dram/src/core/refresh/RefreshManager.cpp
+++ b/dram/src/core/refresh/RefreshManager.cpp
@@ -99,4 +99,3 @@ void RefreshManager::setupTransactions()
 }
 
 } /* namespace core */
-
diff --git a/dram/src/core/refresh/RefreshManager.h b/dram/src/core/refresh/RefreshManager.h
index 3ffff7c3..aecb20b3 100644
--- a/dram/src/core/refresh/RefreshManager.h
+++ b/dram/src/core/refresh/RefreshManager.h
@@ -21,13 +21,14 @@ public:
 	RefreshManager(ControllerCore& controller);
 	virtual ~RefreshManager();
 
-	bool hasCollision(const CommandSchedule& schedule) override;
-	bool hasCollision(const ScheduledCommand& command) override;
-	void scheduleRefresh(tlm::tlm_generic_payload& payload, sc_time time) override;
+	virtual bool hasCollision(const CommandSchedule& schedule) override;
+	virtual bool hasCollision(const ScheduledCommand& command) override;
 
+
+	virtual void scheduleRefresh(tlm::tlm_generic_payload& payload, sc_time time) override;
 	void reInitialize(Bank bank, sc_time time) override;
 
-	bool isInvalidated(tlm::tlm_generic_payload& payload, sc_time time) override;
+	virtual	bool isInvalidated(tlm::tlm_generic_payload& payload, sc_time time) override;
 
 private:
 	ControllerCore& controller;
diff --git a/dram/src/core/refresh/RefreshManagerBankwise.cpp b/dram/src/core/refresh/RefreshManagerBankwise.cpp
index 0073510d..8121ccf2 100644
--- a/dram/src/core/refresh/RefreshManagerBankwise.cpp
+++ b/dram/src/core/refresh/RefreshManagerBankwise.cpp
@@ -36,6 +36,8 @@ bool RefreshManagerBankwise::hasCollision(const CommandSchedule& schedule)
 
 bool RefreshManagerBankwise::hasCollision(const ScheduledCommand& command)
 {
+	const ScheduledCommand& ref= controller.state.getLastCommand(Command::AutoRefresh, command.getBank());
+
 	return command.getStart() < controller.state.getLastCommand(Command::AutoRefresh, command.getBank()).getEnd()
 			|| command.getEnd() > nextPlannedRefreshs[command.getBank()];}
 
diff --git a/dram/src/simulation/Controller.h b/dram/src/simulation/Controller.h
index 93da1a68..0c9f5547 100644
--- a/dram/src/simulation/Controller.h
+++ b/dram/src/simulation/Controller.h
@@ -274,10 +274,10 @@ private:
 	{
 		Bank bank = DramExtension::getExtension(payload).getBank();
 		numberOfPayloadsInSystem[bank]--;
-		controller->powerDownManager->sleep(bank, sc_time_stamp());
 		printDebugMessage(
 				"Payload left system on bank " + to_string(bank.ID()) + ". Total number of payloads in Controller: "
 						+ to_string(getTotalNumberOfPayloadsInSystem()));
+		controller->powerDownManager->sleep(bank, sc_time_stamp());
 
 	}
 
@@ -340,7 +340,7 @@ private:
 	void dramPEQCallback(tlm_generic_payload& payload, const tlm_phase& phase)
 	{
 		Bank bank = DramExtension::getExtension(payload).getBank();
-		printDebugMessage("Received " + phaseNameToString(phase) + " from DRAM");
+		printDebugMessage("Received " + phaseNameToString(phase) + " on bank " + to_string(bank.ID()) + " from DRAM");
 
 		if (phase == BEGIN_RD || phase == BEGIN_WR)
 		{
diff --git a/dram/src/simulation/main.cpp b/dram/src/simulation/main.cpp
index f9117679..8d2606e4 100644
--- a/dram/src/simulation/main.cpp
+++ b/dram/src/simulation/main.cpp
@@ -40,7 +40,7 @@ int sc_main(int argc, char **argv)
 	if(argc > 1)
 		simulationToRun = argv[1];
 	else
-		simulationToRun = "sim-batch.xml";
+		simulationToRun = "datasizes.xml";
 
 	SimulationManager manager(resources);
 	manager.loadSimulationsFromXML(resources + "/simulations/" + simulationToRun);