diff --git a/DSView/main.cpp b/DSView/main.cpp
index 7de7bb78..ddce8247 100644
--- a/DSView/main.cpp
+++ b/DSView/main.cpp
@@ -38,8 +38,7 @@
 
 #ifdef _WIN32
 #include <windows.h>
-#endif
- 
+#endif 
 
 void usage()
 {
@@ -53,7 +52,7 @@ void usage()
 		"  -s, --storelog                  Save log to locale file\n"
 		"  -h, -?, --help                  Show help option\n"
 		"\n", DS_BIN_NAME, DS_DESCRIPTION);
-} 
+}
 
 int main(int argc, char *argv[])
 {   
@@ -213,8 +212,7 @@ bool bHighScale = true;
  
 	//init core
 	if (!control->Init()){ 
-		dsv_err("%s", "init error!");
-		dsv_err("%s", control->GetLastError());
+		dsv_err("%s", "init error!"); 
 		return 1;
 	}
 	
@@ -231,6 +229,8 @@ bool bHighScale = true;
 		w.show_doc();  //to show the dailog for open help document
 		ret = a.exec(); //Run the application
 		control->Stop();
+
+		dsv_info("Main window closed.");
 	}
 	catch (const std::exception &e)
 	{
@@ -242,7 +242,9 @@ bool bHighScale = true;
 	control->UnInit();  //uninit
 	control->Destroy();
 
-	dsv_log_uninit();
+	dsv_info("Uninit log.");
 
+	dsv_log_uninit();
+ 
 	return ret;
 }
diff --git a/DSView/pv/appcontrol.cpp b/DSView/pv/appcontrol.cpp
index 618876ce..4a65a4a2 100644
--- a/DSView/pv/appcontrol.cpp
+++ b/DSView/pv/appcontrol.cpp
@@ -91,15 +91,15 @@ bool AppControl::Init()
 
     // Initialise libsigrokdecode
     if (srd_init(path) != SRD_OK)
-    {
-        m_error = "ERROR: libsigrokdecode init failed.";
+    { 
+        dsv_err("%s", "ERROR: libsigrokdecode init failed.");
         return false;
     }
 
     // Load the protocol decoders
     if (srd_decoder_load_all() != SRD_OK)
     {
-        m_error = "ERROR: load the protocol decoders failed.";
+        dsv_err("ERROR: load the protocol decoders failed.");
         return false;
     }
  
@@ -125,11 +125,6 @@ void AppControl::UnInit()
     _session->uninit();
 }
 
-const char *AppControl::GetLastError()
-{
-    return m_error.c_str();
-}
-
  bool AppControl::TopWindowIsMaximized()
  {
      if (_topWindow != NULL){
diff --git a/DSView/pv/appcontrol.h b/DSView/pv/appcontrol.h
index 189d0f6e..8cef0051 100644
--- a/DSView/pv/appcontrol.h
+++ b/DSView/pv/appcontrol.h
@@ -48,9 +48,7 @@ public:
 
     void Stop();
 
-    void UnInit();
-
-    const char* GetLastError(); 
+    void UnInit(); 
 
     inline pv::SigSession*  GetSession(){
         return _session;
@@ -69,8 +67,7 @@ public:
 public:
     std::string        _open_file_name; 
 
-private:
-    std::string         m_error; 
+private: 
     pv::SigSession      *_session;
     QWidget             *_topWindow;
 };