diff --git a/DSView/pv/appcontrol.cpp b/DSView/pv/appcontrol.cpp
index dff58bc7..eae70d5d 100644
--- a/DSView/pv/appcontrol.cpp
+++ b/DSView/pv/appcontrol.cpp
@@ -71,8 +71,10 @@ bool AppControl::Init()
         return false;
     }
 
+    const char *decoderScriptDir = "/home/lala/tmpdir/any";
+
     // Initialise libsigrokdecode
-    if (srd_init(NULL) != SRD_OK)
+    if (srd_init(decoderScriptDir) != SRD_OK)
     {
         m_error = "ERROR: libsigrokdecode init failed.";
         return false;
diff --git a/DSView/pv/data/decoderstack.cpp b/DSView/pv/data/decoderstack.cpp
index c53affa1..b8c15a24 100755
--- a/DSView/pv/data/decoderstack.cpp
+++ b/DSView/pv/data/decoderstack.cpp
@@ -516,11 +516,18 @@ void DecoderStack::decode_data(const uint64_t decode_start, const uint64_t decod
         if (chunk_end - i > MaxChunkSize)
             chunk_end = i + MaxChunkSize;
 
-        if (srd_session_send(session, i, chunk_end,
-                             chunk.data(), chunk_const.data(), chunk_end - i, &error) != SRD_OK) {
+        if (srd_session_send(
+                session,
+                i,
+                chunk_end,
+                chunk.data(),
+                chunk_const.data(),
+                chunk_end - i,
+                &error) != SRD_OK){
             _error_message = QString::fromLocal8Bit(error);
             break;
         }
+
         i = chunk_end;
 
         {
diff --git a/DSView/pv/data/decoderstack.h b/DSView/pv/data/decoderstack.h
index cef31dab..7685e272 100755
--- a/DSView/pv/data/decoderstack.h
+++ b/DSView/pv/data/decoderstack.h
@@ -94,9 +94,7 @@ public:
     }
 
 	void push(decode::Decoder *decoder);
-
     void remove(decode::Decoder *decoder);
-
     void build_row();
 
 	int64_t samples_decoded();
@@ -111,7 +109,6 @@ public:
 
     uint64_t get_annotation_index(
         const decode::Row &row, uint64_t start_sample);
-
     uint64_t get_max_annotation(const decode::Row &row);
     uint64_t get_min_annotation(const decode::Row &row); // except instant(end=start) annotation
 
@@ -119,9 +116,7 @@ public:
     std::map<const decode::Row, bool> get_rows_lshow();
     void set_rows_gshow(const decode::Row row, bool show);
     void set_rows_lshow(const decode::Row row, bool show);
-
     bool has_annotations(const decode::Row &row);
-
     uint64_t list_annotation_size();
     uint64_t list_annotation_size(uint16_t row_index);
 
@@ -131,13 +126,9 @@ public:
 
 
     bool list_row_title(int row, QString &title);
-
 	QString error_message();
-
 	void clear();
-
     void init();
-
 	uint64_t get_max_sample_count();
 
     inline bool IsRunning(){
@@ -145,31 +136,22 @@ public:
     }
  
 	void begin_decode_work();
-
     void do_decode_work();
-
-    void stop_decode_work();
-  
+    void stop_decode_work();  
     int list_rows_size();
-
     bool options_changed();
     void set_options_changed(bool changed);
 
     uint64_t sample_count();
     uint64_t sample_rate();
-
     bool out_of_memory();
-
     void set_mark_index(int64_t index);
     int64_t get_mark_index();
-
     void frame_ended();
 
 private:
     void decode_data(const uint64_t decode_start, const uint64_t decode_end, srd_session *const session);
-
 	void decode_proc();
-
 	static void annotation_callback(srd_proto_data *pdata, void *decoder);
 
   
@@ -179,7 +161,6 @@ signals:
   
 private: 
 	std::list<decode::Decoder*> _stack;
-
 	pv::data::LogicSnapshot *_snapshot;
   
     std::map<const decode::Row, decode::RowData*>   _rows;
@@ -192,15 +173,15 @@ private:
     volatile bool   _options_changed;
     volatile bool   _no_memory;
     int64_t         _mark_index;
+
     DecoderStatus   *_decoder_status;
     QString         _error_message;
     int64_t	        _samples_decoded;
     uint64_t        _sample_count; 
  
-    decode_task_status  *_stask_stauts;
-    
+    decode_task_status  *_stask_stauts;    
     mutable std::mutex _output_mutex;
-  
+
 	friend class DecoderStackTest::TwoDecoderStack;
 };
 
diff --git a/DSView/pv/dock/protocoldock.cpp b/DSView/pv/dock/protocoldock.cpp
index 26afcc8b..a9affcdc 100755
--- a/DSView/pv/dock/protocoldock.cpp
+++ b/DSView/pv/dock/protocoldock.cpp
@@ -195,9 +195,7 @@ ProtocolDock::ProtocolDock(QWidget *parent, view::View &view, SigSession *sessio
     connect(_table_view->horizontalHeader(), SIGNAL(sectionResized(int,int,int)), this, SLOT(column_resize(int, int, int)));
     connect(_search_edit, SIGNAL(editingFinished()), this, SLOT(search_changed()));
 
-    retranslateUi();
-
-    ds_debug("protocol panel\n");
+    retranslateUi(); 
 }
 
 ProtocolDock::~ProtocolDock()
@@ -303,14 +301,19 @@ void ProtocolDock::add_protocol(bool silent)
         return;
     } 
 
+    //have no protocol
+    if (_protocol_combobox->count() == 0){
+        if (!silent){
+            MsgBox::Show(NULL, "Protocol list is empty!");
+        }
+        return;
+    }
+
     srd_decoder *const decoder = 
           (srd_decoder *)(_protocol_combobox->itemData(_protocol_combobox->currentIndex())).value<void *>();
 
     DecoderStatus *dstatus = new DecoderStatus();
     dstatus->m_format = (int)DecoderDataFormat::hex;
-
-    int numm= _protocol_items.size();
-    numm += 0;
   
     if (_session->add_decoder(decoder, silent, dstatus))
     {
diff --git a/DSView/pv/mainwindow.cpp b/DSView/pv/mainwindow.cpp
index 2c711e74..a8f3dc45 100755
--- a/DSView/pv/mainwindow.cpp
+++ b/DSView/pv/mainwindow.cpp
@@ -21,9 +21,6 @@
  */
 
 
-
-#include <libsigrokdecode4DSL/libsigrokdecode.h>
-#include "dock/protocoldock.h"
  
 #include <QAction>
 #include <QButtonGroup>
@@ -70,6 +67,7 @@
 #include "dock/dsotriggerdock.h"
 #include "dock/measuredock.h"
 #include "dock/searchdock.h"
+#include "dock/protocoldock.h"
 
 #include "view/view.h"
 #include "view/trace.h"
@@ -168,19 +166,16 @@ void MainWindow::setup_ui()
     addToolBar(_trig_bar);
     addToolBar(_file_bar);
     addToolBar(_logo_bar);
-
-    // Setup the dockWidget
-
-    // protocol dock
+  
+    //Setup the dockWidget
     _protocol_dock=new QDockWidget(tr("Protocol"),this);
     _protocol_dock->setObjectName("protocol_dock");
     _protocol_dock->setFeatures(QDockWidget::DockWidgetMovable);
     _protocol_dock->setAllowedAreas(Qt::RightDockWidgetArea);
-    _protocol_dock->setVisible(false);
-    //dock::ProtocolDock *_protocol_widget = new dock::ProtocolDock(_protocol_dock, _session);
+    _protocol_dock->setVisible(false); 
     _protocol_widget = new dock::ProtocolDock(_protocol_dock, *_view, _session);
     _protocol_dock->setWidget(_protocol_widget);
-    qDebug() << "Protocol decoder enabled!\n";
+    //qDebug() << "Protocol decoder enabled!\n";
  
 
     // measure dock
@@ -224,9 +219,7 @@ void MainWindow::setup_ui()
     _logo_bar->installEventFilter(this);
     _dso_trigger_dock->installEventFilter(this);
     _trigger_dock->installEventFilter(this);
-
     _protocol_dock->installEventFilter(this);
-
     _measure_dock->installEventFilter(this);
     _search_dock->installEventFilter(this);
 
diff --git a/DSView/pv/sigsession.cpp b/DSView/pv/sigsession.cpp
index 99a41300..4e9e144c 100755
--- a/DSView/pv/sigsession.cpp
+++ b/DSView/pv/sigsession.cpp
@@ -437,8 +437,7 @@ void SigSession::start_capture(bool instant)
             dsoSig->set_mValid(false);
     }
 
-    // update setting
-    qDebug()<<"device name:"<<_dev_inst->name();
+    // update setting 
 
     if (_dev_inst->name() != "virtual-session")
         _instant = instant;
@@ -1167,8 +1166,6 @@ void SigSession::data_feed_in(const struct sr_dev_inst *sdi,
         _dso_data->snapshot()->capture_ended();
         _analog_data->snapshot()->capture_ended();
 
-        qDebug()<<"data frame end";
-
         for (auto trace : _decode_traces){
             trace->decoder()->frame_ended();
             trace->frame_ended();
@@ -1248,7 +1245,7 @@ void SigSession::hotplug_proc()
     } catch(...) {
         qDebug("Interrupt exception for hotplug thread was thrown.");
     }
-    qDebug("Hotplug thread exit!");
+   // qDebug("Hotplug thread exit!");
 }
 
 void SigSession::register_hotplug_callback()
@@ -1271,10 +1268,9 @@ void SigSession::deregister_hotplug_callback()
 }
 
 void SigSession::start_hotplug_work()
-{
-
+{ 
     // Begin the session
-    qDebug() << "Starting a hotplug thread...\n";
+   // qDebug() << "Starting a hotplug thread...\n";
     _hot_attach = false;
     _hot_detach = false;
 
@@ -1788,7 +1784,7 @@ void SigSession::set_stop_scale(float scale)
 //append a decode task, and try create a thread
  void SigSession::add_decode_task(view::DecodeTrace *trace)
  { 
-     qDebug()<<"add a decode task";
+     //qDebug()<<"add a decode task";
 
      std::lock_guard<std::mutex> lock(_decode_task_mutex);
      _decode_tasks.push_back(trace);
@@ -1844,7 +1840,7 @@ void SigSession::set_stop_scale(float scale)
     //wait thread end
      if (_decode_thread.joinable())
      {
-         qDebug() << "wait the decode thread end";
+       //  qDebug() << "wait the decode thread end";
          _decode_thread.join();
      }
 
@@ -1900,12 +1896,12 @@ void SigSession::set_stop_scale(float scale)
   //the decode task thread proc
   void SigSession::decode_task_proc(){ 
 
-      qDebug()<<"decode thread start";
+      //qDebug()<<"decode thread start";
       auto task = get_top_decode_task();
       
       while (task != NULL)
       {
-          qDebug()<<"one decode task be actived";
+         // qDebug()<<"one decode task be actived";
  
           if (!task->_delete_flag){
               task->decoder()->begin_decode_work();
@@ -1924,7 +1920,7 @@ void SigSession::set_stop_scale(float scale)
           task = get_top_decode_task();
       }  
 
-      qDebug()<<"decode thread end";
+     // qDebug()<<"decode thread end";
       _bDecodeRunning = false;
   }
 
diff --git a/DSView/pv/sigsession.h b/DSView/pv/sigsession.h
index 16864adb..7f478af0 100755
--- a/DSView/pv/sigsession.h
+++ b/DSView/pv/sigsession.h
@@ -274,7 +274,6 @@ private:
 	void set_capture_state(capture_state state);
     void register_hotplug_callback();
     void deregister_hotplug_callback();
-
     bool do_add_decoder(srd_decoder *const dec, bool silent, DecoderStatus *dstatus);
 
     void add_decode_task(view::DecodeTrace *trace);
@@ -301,25 +300,17 @@ private:
      * 	used, or NULL if no input format was selected or
      * 	auto-detected.
      */
-    static sr_input_format* determine_input_file_format(
-        const std::string &filename);
-  
+    static sr_input_format* determine_input_file_format(const std::string &filename);  
     void sample_thread_proc(DevInst *dev_inst);
 
     // data feed
 	void feed_in_header(const sr_dev_inst *sdi);
-
-	void feed_in_meta(const sr_dev_inst *sdi,
-		const sr_datafeed_meta &meta);
-
+	void feed_in_meta(const sr_dev_inst *sdi, const sr_datafeed_meta &meta);
     void feed_in_trigger(const ds_trigger_pos &trigger_pos);
-
 	void feed_in_logic(const sr_datafeed_logic &logic);
 
     void feed_in_dso(const sr_datafeed_dso &dso);
-
-	void feed_in_analog(const sr_datafeed_analog &analog);
-    
+	void feed_in_analog(const sr_datafeed_analog &analog);    
 	void data_feed_in(const struct sr_dev_inst *sdi,
 		const struct sr_datafeed_packet *packet);
 
diff --git a/DSView/pv/storesession.cpp b/DSView/pv/storesession.cpp
index eee40b78..a621dc8e 100755
--- a/DSView/pv/storesession.cpp
+++ b/DSView/pv/storesession.cpp
@@ -23,23 +23,22 @@
 #define __STDC_FORMAT_MACROS
 
 #include "storesession.h"
+#include "sigsession.h"
 
-#include <pv/sigsession.h>
-#include <pv/data/logic.h>
-#include <pv/data/logicsnapshot.h>
-#include <pv/data/dsosnapshot.h>
-#include <pv/data/analogsnapshot.h>
-#include <pv/data/decoderstack.h>
-#include <pv/data/decode/decoder.h>
-#include <pv/data/decode/row.h>
-#include <pv/view/trace.h>
-#include <pv/view/signal.h>
-#include <pv/view/logicsignal.h>
-#include <pv/view/dsosignal.h>
-#include <pv/view/decodetrace.h>
-#include <pv/device/devinst.h>
-#include <pv/dock/protocoldock.h>
- 
+#include "data/logic.h"
+#include "data/logicsnapshot.h"
+#include "data/dsosnapshot.h"
+#include "data/analogsnapshot.h"
+#include "data/decoderstack.h"
+#include "data/decode/decoder.h"
+#include "data/decode/row.h"
+#include "view/trace.h"
+#include "view/signal.h"
+#include "view/logicsignal.h"
+#include "view/dsosignal.h"
+#include "view/decodetrace.h"
+#include "device/devinst.h"
+#include "dock/protocoldock.h" 
  
 #include <QFileDialog>
 #include <QDir>
@@ -51,7 +50,7 @@
 #include <QTextStream>
 #include <QDebug>
 
-
+#include <libsigrokdecode4DSL/libsigrokdecode.h> 
 #include "config/appconfig.h"
  
 namespace pv {
diff --git a/DSView/pv/storesession.h b/DSView/pv/storesession.h
index c7ef0e1d..daadef74 100755
--- a/DSView/pv/storesession.h
+++ b/DSView/pv/storesession.h
@@ -29,7 +29,7 @@
 #include <QObject>
 
 #include <libsigrok4DSL/libsigrok.h>
-#include <libsigrokdecode4DSL/libsigrokdecode.h>
+
 #include "ZipMaker.h"
 
 namespace pv {
diff --git a/DSView/pv/toolbars/samplingbar.cpp b/DSView/pv/toolbars/samplingbar.cpp
index ff193b4c..33f52c72 100755
--- a/DSView/pv/toolbars/samplingbar.cpp
+++ b/DSView/pv/toolbars/samplingbar.cpp
@@ -339,11 +339,14 @@ void SamplingBar::zero_adj()
         if ((dsoSig = dynamic_cast<view::DsoSignal*>(s)))
             dsoSig->set_enable(true);
     }
+    
     const int index_back = _sample_count.currentIndex();
     int i = 0;
+
     for (i = 0; i < _sample_count.count(); i++)
         if (_sample_count.itemData(i).value<uint64_t>() == ZeroTimeBase)
             break;
+
     _sample_count.setCurrentIndex(i);
     commit_hori_res();
 
@@ -722,8 +725,6 @@ double SamplingBar::get_hori_res()
 double SamplingBar::hori_knob(int dir)
 {
     double hori_res = -1;
-    disconnect(&_sample_count, SIGNAL(currentIndexChanged(int)),
-        this, SLOT(on_samplecount_sel(int)));
 
     if (0 == dir) {
         hori_res = commit_hori_res();
@@ -735,6 +736,9 @@ double SamplingBar::hori_knob(int dir)
         hori_res = commit_hori_res();
     }
 
+    disconnect(&_sample_count, SIGNAL(currentIndexChanged(int)),
+        this, SLOT(on_samplecount_sel(int)));
+
     connect(&_sample_count, SIGNAL(currentIndexChanged(int)),
         this, SLOT(on_samplecount_sel(int)));
 
diff --git a/DSView/pv/toolbars/samplingbar.h b/DSView/pv/toolbars/samplingbar.h
index 14779f96..3459bb93 100755
--- a/DSView/pv/toolbars/samplingbar.h
+++ b/DSView/pv/toolbars/samplingbar.h
@@ -64,6 +64,7 @@ namespace pv
             static const int RefreshShort = 500;
             static const uint64_t LogicMaxSWDepth64 = SR_GB(16);
             static const uint64_t LogicMaxSWDepth32 = SR_GB(8);
+            
             static const uint64_t AnalogMaxSWDepth = SR_Mn(100);
             static const QString RLEString;
             static const QString DIVString;
@@ -71,11 +72,8 @@ namespace pv
 
         public:
             SamplingBar(SigSession *session, QWidget *parent);
-
             void set_device_list(const std::list<DevInst*> &devices, DevInst* selected);
-
             DevInst *get_selected_device();
-
             void update_sample_rate_selector();
 
             void set_sampling(bool sampling);
@@ -83,9 +81,7 @@ namespace pv
             bool get_instant();
 
             void enable_toggle(bool enable);
-
             void enable_run_stop(bool enable);
-
             void enable_instant(bool enable);
 
             double hori_knob(int dir);
@@ -132,37 +128,33 @@ namespace pv
             void reload();
 
         private:
-            SigSession *_session;
+            SigSession          *_session;
+            mutable std::mutex  _sampling_mutex;
+            bool                _enable;
+            bool                _sampling;
 
-            mutable std::mutex _sampling_mutex;
-            bool _enable;
-            bool _sampling;
-
-            QToolButton _device_type;
-
-            QComboBox _device_selector;
+            QToolButton         _device_type;
+            QComboBox           _device_selector;
             std::map<const void *, DevInst*> _device_selector_map;
-            bool _updating_device_selector;
+            bool                _updating_device_selector;
 
-            QToolButton _configure_button;
+            QToolButton         _configure_button;
+            QComboBox           _sample_count;
+            QComboBox           _sample_rate;
+            bool                _updating_sample_rate;
+            bool                _updating_sample_count;
 
-            QComboBox _sample_count;
-            QComboBox _sample_rate;
-            bool _updating_sample_rate;
-            bool _updating_sample_count;
+            QToolButton         _run_stop_button;
+            QToolButton         _instant_button;
+            QAction             *_run_stop_action;
+            QAction             *_instant_action;
+            QAction             *_mode_action;
+            QToolButton         _mode_button;
 
-            QToolButton _run_stop_button;
-            QToolButton _instant_button;
-            QAction *_run_stop_action;
-            QAction *_instant_action;
-
-            QAction *_mode_action;
-            QToolButton _mode_button;
-            QMenu *_mode_menu;
-            QAction *_action_repeat;
-            QAction *_action_single;
-
-            bool _instant;
+            QMenu               *_mode_menu;
+            QAction             *_action_repeat;
+            QAction             *_action_single;
+            bool                _instant;
         };
 
     } // namespace toolbars
diff --git a/DSView/pv/view/header.cpp b/DSView/pv/view/header.cpp
index 3eecd685..90b734f4 100755
--- a/DSView/pv/view/header.cpp
+++ b/DSView/pv/view/header.cpp
@@ -58,6 +58,8 @@ Header::Header(View &parent) :
     _moveFlag = false;
     _colorFlag = false;
     _nameFlag = false;
+    _context_trace = NULL;
+    
     nameEdit = new QLineEdit(this);
     nameEdit->setFixedWidth(100);
     nameEdit->hide();
diff --git a/libsigrokdecode4DSL/srd.c b/libsigrokdecode4DSL/srd.c
index 38bb803e..92be591f 100755
--- a/libsigrokdecode4DSL/srd.c
+++ b/libsigrokdecode4DSL/srd.c
@@ -190,7 +190,7 @@ SRD_API int srd_init(const char *path)
 	size_t i;
 	int ret;
 	const char *env_path;
-
+ 	
 	if (max_session_id != -1) {
 		srd_err("libsigrokdecode is already initialized.");
 		return SRD_ERR;
@@ -202,30 +202,15 @@ SRD_API int srd_init(const char *path)
 	PyImport_AppendInittab("sigrokdecode", PyInit_sigrokdecode);
 
 	/* Initialize the Python interpreter. */
-    Py_InitializeEx(0);
+    Py_InitializeEx(0); 
 
-	/* Locations relative to the XDG system data directories. */
-	sys_datadirs = g_get_system_data_dirs();
-	for (i = g_strv_length((char **)sys_datadirs); i > 0; i--) {
-		ret = searchpath_add_xdg_dir(sys_datadirs[i-1]);
-		if (ret != SRD_OK) {
-			Py_Finalize();
-			return ret;
-		}
-	}
 #ifdef DECODERS_DIR
 	/* Hardcoded decoders install location, if defined. */
 	if ((ret = srd_decoder_searchpath_add(DECODERS_DIR)) != SRD_OK) {
 		Py_Finalize();
 		return ret;
 	}
-#endif
-	/* Location relative to the XDG user data directory. */
-	ret = searchpath_add_xdg_dir(g_get_user_data_dir());
-	if (ret != SRD_OK) {
-		Py_Finalize();
-		return ret;
-	}
+#endif 
 
 	/* Path specified by the user. */
 	if (path) {
@@ -234,13 +219,36 @@ SRD_API int srd_init(const char *path)
 			return ret;
 		}
 	}
+	else{ 
+		/* Locations relative to the XDG system data directories. */
+		sys_datadirs = g_get_system_data_dirs();
+		for (i = g_strv_length((char **)sys_datadirs); i > 0; i--)
+		{
+			ret = searchpath_add_xdg_dir(sys_datadirs[i - 1]);
+			if (ret != SRD_OK)
+			{
+				Py_Finalize();
+				return ret;
+			}
+		}
 
-	/* Environment variable overrides everything, for debugging. */
-	if ((env_path = g_getenv("SIGROKDECODE_DIR"))) {
-		if ((ret = srd_decoder_searchpath_add(env_path)) != SRD_OK) {
+		/* Location relative to the XDG user data directory. */
+		ret = searchpath_add_xdg_dir(g_get_user_data_dir());
+		if (ret != SRD_OK)
+		{
 			Py_Finalize();
 			return ret;
 		}
+
+		/* Environment variable overrides everything, for debugging. */
+		if ((env_path = g_getenv("SIGROKDECODE_DIR")))
+		{
+			if ((ret = srd_decoder_searchpath_add(env_path)) != SRD_OK)
+			{
+				Py_Finalize();
+				return ret;
+			}
+		}
 	}
 
 	/* Initialize the Python GIL (this also happens to acquire it). */
diff --git a/libsigrokdecode4DSL/util.c b/libsigrokdecode4DSL/util.c
index 45fb2d1c..3211fae5 100755
--- a/libsigrokdecode4DSL/util.c
+++ b/libsigrokdecode4DSL/util.c
@@ -39,13 +39,13 @@ SRD_PRIV PyObject *py_import_by_name(const char *name)
 	PyGILState_STATE gstate;
 
 	gstate = PyGILState_Ensure();
-
+  
 	py_modname = PyUnicode_FromString(name);
 	if (!py_modname) {
 		PyGILState_Release(gstate);
 		return NULL;
-	}
-
+	} 
+ 
 	py_mod = PyImport_Import(py_modname);
 	Py_DECREF(py_modname);