diff --git a/ClassDigitizer2Gen.cpp b/ClassDigitizer2Gen.cpp
index 9f374c9..68b2cd8 100644
--- a/ClassDigitizer2Gen.cpp
+++ b/ClassDigitizer2Gen.cpp
@@ -484,17 +484,17 @@ int Digitizer2Gen::ReadData(){
 
 //###########################################
 
-void Digitizer2Gen::OpenOutFile(std::string fileName){
+void Digitizer2Gen::OpenOutFile(std::string fileName, const char * mode){
   outFileNameBase = fileName;
   sprintf(outFileName, "%s_%03d.sol", fileName.c_str(), outFileIndex);
-  outFile = fopen(outFileName, "a+");
+  outFile = fopen(outFileName, mode);
   fseek(outFile, 0L, SEEK_END);
   outFileSize = ftell(outFile);  // unsigned int =  Max ~4GB
 
 }
 
 void Digitizer2Gen::CloseOutFile(){
-  fclose(outFile);
+  if( outFile != NULL ) fclose(outFile);
 }
 
 void Digitizer2Gen::SaveDataToFile(){
diff --git a/ClassDigitizer2Gen.h b/ClassDigitizer2Gen.h
index 0831989..50b5284 100644
--- a/ClassDigitizer2Gen.h
+++ b/ClassDigitizer2Gen.h
@@ -114,7 +114,7 @@ class Digitizer2Gen {
     uint64_t       GetHandle()    const {return handle;}
     
     Event *evt;  // should be evt[MaxNumber], when full or stopACQ, save into file
-    void OpenOutFile(std::string fileName);
+    void OpenOutFile(std::string fileName, const char * mode = "w");
     void CloseOutFile();
     void SaveDataToFile();
     unsigned int GetFileSize() {return outFileSize;}
diff --git a/influxdb.cpp b/influxdb.cpp
index 403da5f..08b484e 100644
--- a/influxdb.cpp
+++ b/influxdb.cpp
@@ -5,27 +5,31 @@ InfluxDB::InfluxDB(std::string url, bool verbose){
 
   curl = curl_easy_init();  
   if( verbose) curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
-  this->databaseIP  = url;
+  SetURL(url);
   respondCode = 0;
   dataPoints = "";
 }
 
 InfluxDB::~InfluxDB(){
-  
   curl_easy_cleanup(curl);
 }
 
 void InfluxDB::SetURL(std::string url){
-  this->databaseIP = url;
+  // check the last char of url is "/"
+  if( url.back() != '/') {
+    this->databaseIP = url + "/";
+  }else{
+    this->databaseIP = url;
+  }
 }
 
 bool InfluxDB::TestingConnection(){
-  ShowDatabases();
+  CheckDatabases();
   if( respond != CURLE_OK ) return false;
   return true;
 }
 
-std::string InfluxDB::ShowDatabases(){
+std::string InfluxDB::CheckDatabases(){
   curl_easy_setopt(curl, CURLOPT_POST, 1);
   
   curl_easy_setopt(curl, CURLOPT_URL, (databaseIP   + "/query").c_str());
@@ -124,9 +128,9 @@ void InfluxDB::PrintDataPoints(){
   printf("%s\n", dataPoints.c_str());
 }
 
-void InfluxDB::WriteData(std::string databaseName){
+void InfluxDB::WriteData(std::string databaseName){  
   curl_easy_setopt(curl, CURLOPT_URL, (databaseIP + "write?db=" + databaseName).c_str());
-  curl_easy_setopt(curl, CURLOPT_POST, 1);
+  curl_easy_setopt(curl, CURLOPT_POST, 1L);
   curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, static_cast<long>(dataPoints.length()));
   curl_easy_setopt(curl, CURLOPT_POSTFIELDS, dataPoints.c_str());
   Execute();
diff --git a/influxdb.h b/influxdb.h
index c59c9cd..ad98a65 100644
--- a/influxdb.h
+++ b/influxdb.h
@@ -35,10 +35,10 @@ class InfluxDB{
     bool IsURLValid() const {return isURLValid;}
 
     /// Query
-    std::string ShowDatabases(); /// this save the list of database into databaseList
+    std::string CheckDatabases(); /// this save the list of database into databaseList
     std::string Query(std::string databaseName, std::string query);
 
-    /// the ShowDatabases() function must be called before  
+    /// the CheckDatabases() function must be called before  
     std::vector<std::string> GetDatabaseList() {return databaseList;}
 
     void CreateDatabase(std::string databaseName);
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 0ad03c9..aac3e92 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -145,8 +145,11 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent){
     leRunID = new QLineEdit(this);
     leRunID->setAlignment(Qt::AlignHCenter);
     leRunID->setReadOnly(true);
+    leRunID->setStyleSheet("background-color: #F3F3F3;");
 
     chkSaveRun = new QCheckBox("Save Run", this);
+    chkSaveRun->setChecked(true);
+    chkSaveRun->setEnabled(false);
 
     cbAutoRun = new QComboBox(this);
     cbAutoRun->addItem("Single Run");
@@ -167,8 +170,9 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent){
 
     QLabel * lbRunComment = new QLabel("Run Comment : ", this);
     lbRunComment->setAlignment(Qt::AlignRight | Qt::AlignCenter);
-    QLineEdit * runComment = new QLineEdit(this);
-    runComment->setReadOnly(true);
+    QLineEdit * leRunComment = new QLineEdit(this);
+    leRunComment->setReadOnly(true);
+    leRunComment->setStyleSheet("background-color: #F3F3F3;");
     
     layout2->addWidget(lbRawDataPath, 0, 0);
     layout2->addWidget(leRawDataPath, 0, 1, 1, 4);
@@ -182,7 +186,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent){
     layout2->addWidget(bnStopACQ,  1, 5);
 
     layout2->addWidget(lbRunComment, 2, 0);
-    layout2->addWidget(runComment,   2, 1, 1, 5);
+    layout2->addWidget(leRunComment,   2, 1, 1, 5);
 
     layout2->setColumnStretch(0, 2);
     layout2->setColumnStretch(1, 1);
@@ -229,6 +233,10 @@ MainWindow::~MainWindow(){
   //delete logInfo;
   printf("- %s\n", __func__);
 
+  for( int i = 0; i < nDigi ; i++){
+    if( readDataThread[i]->isRunning()) StopACQ();
+  }
+
   DeleteTriggerLineEdit();
   delete scalarThread;
   CloseDigitizers();
@@ -244,7 +252,18 @@ MainWindow::~MainWindow(){
 //^################################################################ ACQ control 
 void MainWindow::StartACQ(){
 
-  LogMsg("Start Run....");
+  if( chkSaveRun->isChecked() ){
+    runIDStr = QString::number(runID).rightJustified(3, '0');
+    LogMsg("=========================== Start <b><font style=\"color : red;\">Run-" + runIDStr + "</font></b>");
+    //TODO ============ start comment
+
+    //TODO ============ elog
+
+    //TODO ============ update expName.sh
+
+  }else{
+    LogMsg("=========================== Start no-save Run");
+  }
   for( int i =0 ; i < nDigi; i ++){
     if( digi[i]->IsDummy () ) continue;
     digi[i]->Reset();
@@ -253,13 +272,15 @@ void MainWindow::StartACQ(){
 
     digi[i]->WriteValue("/ch/0..63/par/WaveAnalogProbe0", "ADCInput");
 
-    //TODO =========================== save file 
-    remove("haha_000.sol"); // remove file
-    digi[i]->OpenOutFile("haha");// haha_000.sol
+    if( chkSaveRun->isChecked() ){
+      QString outFileName = rawDataFolder + "/" + expName + "_" + runIDStr+ "_" + QString::number(digi[i]->GetSerialNumber());
+      qDebug() << outFileName;
+      digi[i]->OpenOutFile(outFileName.toStdString());// overwrite
+    }
     digi[i]->StartACQ();
 
     //TODO ========================== Sync start.
-    readDataThread[i]->SetScopeRun(!chkSaveRun->isChecked ());
+    readDataThread[i]->SetSaveData(chkSaveRun->isChecked());
     readDataThread[i]->start();
   }
 
@@ -269,8 +290,8 @@ void MainWindow::StartACQ(){
   bnStartACQ->setEnabled(false);
   bnStopACQ->setEnabled(true);
   bnOpenScope->setEnabled(false);
+  chkSaveRun->setEnabled(false);
 
-  LogMsg("end of " + QString::fromStdString(__func__));
 }
 
 void MainWindow::StopACQ(){
@@ -279,22 +300,35 @@ void MainWindow::StopACQ(){
     if( digi[i]->IsDummy () ) continue;
     digi[i]->StopACQ();
 
-    readDataThread[i]->quit();
-    readDataThread[i]->wait();
-    digi[i]->CloseOutFile();
-
+    if( readDataThread[i]->isRunning()){
+      readDataThread[i]->quit();
+      readDataThread[i]->wait();
+    }
+    if( chkSaveRun->isChecked() ) digi[i]->CloseOutFile();
   }
 
-  scalarThread->Stop();
-  scalarThread->quit();
-  scalarThread->wait();
-
-  LogMsg("Stop Run");
+  if( scalarThread->isRunning()){
+    scalarThread->Stop();
+    scalarThread->quit();
+    scalarThread->wait();
+  }
+  if( chkSaveRun->isChecked() ){
+    LogMsg("===========================  <b><font style=\"color : red;\">Run-" + runIDStr + "</font></b> stopped.");
+  }else{
+    LogMsg("===========================  no-Save Run stopped.");
+  }
   bnStartACQ->setEnabled(true);
   bnStopACQ->setEnabled(false);
   bnOpenScope->setEnabled(true);
+  chkSaveRun->setEnabled(true);
 
   if( chkSaveRun->isChecked() ){
+
+    //TODO ============ stop comment
+
+
+    //TODO ============= elog
+    
     runID ++;
     leRunID->setText(QString::number(runID));
   }
@@ -324,10 +358,16 @@ void MainWindow::OpenDigitizers(){
       bnStartACQ->setEnabled(true);
       bnStopACQ->setEnabled(false);
       bnOpenScope->setEnabled(true);
+      chkSaveRun->setEnabled(true);
+      bnOpenDigitizers->setEnabled(false);
+      bnOpenDigitizers->setStyleSheet("");
 
       readDataThread[i] = new ReadDataThread(digi[i], this);
       connect(readDataThread[i], &ReadDataThread::sendMsg, this, &MainWindow::LogMsg);
 
+      SetUpScalar();
+      bnOpenScalar->setEnabled(true);
+
     }else{
       digi[i]->SetDummy(i);
       LogMsg("Cannot open digitizer. Use a dummy with serial number " + QString::number(i) + " and " + QString::number(digi[i]->GetNChannels()) + " ch.");
@@ -338,11 +378,7 @@ void MainWindow::OpenDigitizers(){
 
   bnDigiSettings->setEnabled(true);
   bnCloseDigitizers->setEnabled(true);
-  bnOpenDigitizers->setEnabled(false);
-  bnOpenDigitizers->setStyleSheet("");
 
-  SetUpScalar();
-  bnOpenScalar->setEnabled(true);
 }
 
 void MainWindow::CloseDigitizers(){
@@ -380,6 +416,7 @@ void MainWindow::CloseDigitizers(){
   bnStopACQ->setEnabled(false);
   bnOpenDigitizers->setFocus();
   bnOpenScalar->setEnabled(false);
+  chkSaveRun->setEnabled(false);
 
 }
 
@@ -421,7 +458,7 @@ void MainWindow::OpenScaler(){
 
 void MainWindow::SetUpScalar(){
 
-  scalar->setGeometry(0, 0, 10 + nDigi * 200, 800);
+  scalar->setGeometry(0, 0, 10 + nDigi * 230, 800);
 
   lbLastUpdateTime = new QLabel("Last update : ");
   lbLastUpdateTime->setAlignment(Qt::AlignCenter);
@@ -505,7 +542,10 @@ void MainWindow::UpdateScalar(){
 
   lbLastUpdateTime->setText("Last update: " + QDateTime::currentDateTime().toString("MM.dd hh:mm:ss"));
 
+  printf("++++++++++++++++++ influx %p\n", influx);
   if( influx ) influx->ClearDataPointsBuffer();
+  std::string haha[MaxNumberOfChannel] = {""};
+  double acceptRate[MaxNumberOfChannel] = {0};
 
   ///===== Get trigger for all channel
   for( int iDigi = 0; iDigi < nDigi; iDigi ++ ){
@@ -521,8 +561,6 @@ void MainWindow::UpdateScalar(){
 
     //=========== another method, directly readValue
 
-    std::string haha[MaxNumberOfChannel] = {""};
-    double acceptRate[MaxNumberOfChannel] = {0};
 
     digiMTX.lock();
     for( int ch = 0; ch < digi[iDigi]->GetNChannels(); ch ++){
@@ -546,9 +584,11 @@ void MainWindow::UpdateScalar(){
     }
   }
 
-  influx->WriteData(DatabaseName.toStdString());
-  influx->ClearDataPointsBuffer();
-
+  if( influx ){
+    //influx->PrintDataPoints();
+    influx->WriteData(DatabaseName.toStdString());
+    influx->ClearDataPointsBuffer();
+  }
 }
 
 //^###################################################################### Program Settings
@@ -778,12 +818,30 @@ void MainWindow::SetupInflux(){
     influx = new InfluxDB(DatabaseIP.toStdString(), false);
 
     if( influx->TestingConnection() ){
-      LogMsg("InfluxDB URL (<b>"+ DatabaseIP + "</b>) is Valid");
+      LogMsg("<font style=\"color : green;\"> InfluxDB URL (<b>"+ DatabaseIP + "</b>) is Valid </font>");
+
+      //==== chck database exist
+      std::vector<std::string> databaseList = influx->GetDatabaseList();
+      bool foundDatabase = false;
+      for( int i = 0; i < (int) databaseList.size(); i++){
+        if( databaseList[i] == DatabaseName.toStdString() ) foundDatabase = true;
+      }
+
+      if( foundDatabase ){
+        LogMsg("<font style=\"color : green;\"> Database <b>" + DatabaseName + "</b> found.");
+      }else{
+        LogMsg("<font style=\"color : red;\"> Database <b>" + DatabaseName + "</b> NOT found.");
+        delete influx;
+        influx = NULL;
+      }
+
     }else{
       LogMsg("<font style=\"color : red;\"> InfluxDB URL (<b>"+ DatabaseIP + "</b>) is NOT Valid </font>");
       delete influx;
       influx = NULL;
     }
+  }else{
+    LogMsg("No database is provided.");
   }
 }
 
diff --git a/mainwindow.h b/mainwindow.h
index cc5efd0..29d5414 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -142,6 +142,7 @@ private:
   QString expName;
   QString rawDataFolder;
   unsigned int runID;
+  QString runIDStr;
   unsigned int elogID;
 
 };
diff --git a/manyThread.h b/manyThread.h
index 31ada72..ac521db 100644
--- a/manyThread.h
+++ b/manyThread.h
@@ -15,9 +15,9 @@ class ReadDataThread : public QThread {
 public:
   ReadDataThread(Digitizer2Gen * dig, QObject * parent = 0) : QThread(parent){ 
     this->digi = dig;
-    isScopeRun = false;
+    isSaveData = false;
   }
-  void SetScopeRun(bool onOff) {this->isScopeRun = onOff;}
+  void SetSaveData(bool onOff) {this->isSaveData = onOff;}
   void run(){
     clock_gettime(CLOCK_REALTIME, &ta);
     while(true){
@@ -26,16 +26,16 @@ public:
       digiMTX.unlock();
 
       if( ret == CAEN_FELib_Success){
-        if( !isScopeRun) digi->SaveDataToFile();
+        if( isSaveData) digi->SaveDataToFile();
       }else if(ret == CAEN_FELib_Stop){
         digi->ErrorMsg("No more data");
         break;
       }else{
-        //digi->ErrorMsg("ReadDataLoop()");
+        digi->ErrorMsg("ReadDataLoop()");
         digi->evt->ClearTrace();
       }
 
-      if( !isScopeRun ){
+      if( isSaveData ){
         clock_gettime(CLOCK_REALTIME, &tb);
         if( tb.tv_sec - ta.tv_sec > 2 ) {
           emit sendMsg("FileSize : " +  QString::number(digi->GetFileSize()/1024./1024.) + " MB");
@@ -52,7 +52,7 @@ signals:
 private:
   Digitizer2Gen * digi; 
   timespec ta, tb;
-  bool isScopeRun;
+  bool isSaveData;
 };
 
 //^#===================================================== UpdateTrace Thread
diff --git a/scope.cpp b/scope.cpp
index 7844717..8c2cef8 100644
--- a/scope.cpp
+++ b/scope.cpp
@@ -428,7 +428,7 @@ void Scope::StartScope(){
 
   digi[iDigi]->StartACQ();
 
-  readDataThread[iDigi]->SetScopeRun(true);
+  readDataThread[iDigi]->SetSaveData(false);
   readDataThread[iDigi]->start();
 
   updateTraceThread->start();
diff --git a/test.cpp b/test.cpp
index 5e71eb9..84833a6 100644
--- a/test.cpp
+++ b/test.cpp
@@ -92,7 +92,7 @@ int main(int argc, char* argv[]){
   digi->Reset();
   digi->ProgramPHA(false);
   
-  printf("--------%s \n", digi->ReadChValue(0, "WaveAnalogprobe0", true).c_str());
+  printf("--------%s \n", digi->ReadChValue("0..63", "WaveAnalogprobe0", true).c_str());
 
   //printf("%s \n", digi->ReadValue("/ch/0/par/ChRealtimeMonitor").c_str());
   //printf("%s \n", digi->ReadValue("/ch/0/par/Energy_Nbit").c_str());
@@ -122,7 +122,7 @@ int main(int argc, char* argv[]){
   printf("%s\n", digi->GetPath(parHandle).c_str());    
   */
 
-/*  
+  
   digi->ReadDigitizerSettings();
 
   digi->SetPHADataFormat(1);
@@ -131,7 +131,6 @@ int main(int argc, char* argv[]){
 
   digi->OpenOutFile("haha");
 
-
   digi->StartACQ();
 
   timespec t0, t1;
@@ -160,7 +159,6 @@ int main(int argc, char* argv[]){
 
   digi->CloseOutFile();  
 
-*/
 
 
   digi->CloseDigitizer();