diff --git a/ClassDigitizer2Gen.cpp b/ClassDigitizer2Gen.cpp
index bec2955..d1dd432 100644
--- a/ClassDigitizer2Gen.cpp
+++ b/ClassDigitizer2Gen.cpp
@@ -765,7 +765,7 @@ void Digitizer2Gen::ReadAllSettings(){
   }
 }
 
-int Digitizer2Gen::SaveSettingsToFile(const char * saveFileName){
+int Digitizer2Gen::SaveSettingsToFile(const char * saveFileName, bool setReadOnly){
   if( saveFileName != NULL) settingFileName = saveFileName;
 
   int totCount = 0;
@@ -811,6 +811,11 @@ int Digitizer2Gen::SaveSettingsToFile(const char * saveFileName){
       return -1;
     }
 
+    if( setReadOnly ){
+      int result = chmod(saveFileName, S_IRUSR | S_IRGRP | S_IROTH);
+      if( result != 0 ) printf("somewrong when set file (%s) to read only.", saveFileName);
+    }
+
     //printf("Saved setting files to %s\n", saveFileName);
     return 1;
 
diff --git a/ClassDigitizer2Gen.h b/ClassDigitizer2Gen.h
index 6754778..7fa1f41 100644
--- a/ClassDigitizer2Gen.h
+++ b/ClassDigitizer2Gen.h
@@ -130,7 +130,7 @@ class Digitizer2Gen {
     std::string GetSettingFileName() const {return settingFileName;}
     void SetSettingFileName(std::string fileName) {settingFileName = fileName;}
     void ReadAllSettings(); // read settings from digitier and save to memory
-    int  SaveSettingsToFile(const char * saveFileName = NULL); //Save settings from memory to text file
+    int  SaveSettingsToFile(const char * saveFileName = NULL, bool setReadOnly = false); //Save settings from memory to text file
     int  ReadAndSaveSettingsToFile(const char * saveFileName = NULL); // ReadAllSettings + text file
     bool LoadSettingsFromFile(const char * loadFileName = NULL); // Load settings, write to digitizer and save to memory
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 1c5ed73..a990dec 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -404,7 +404,8 @@ void MainWindow::StartACQ(){
       QString fileSetting = rawDataFolder + "/" + expName + "_" + runIDStr + "XSetting_" + QString::number(digi[i]->GetSerialNumber()) + ".dat";
       digi[i]->SaveSettingsToFile(fileSetting.toStdString().c_str());
 
-      QString outFileName = rawDataFolder + "/" + expName + "_" + runIDStr + "_" + QString::number(digi[i]->GetSerialNumber());
+      // name should be [ExpName]_[runID]_[digiID]_[digiSerialNumber]_[acculmulate_count].sol
+      QString outFileName = rawDataFolder + "/" + expName + "_" + runIDStr + "_" + QString::number(i).rightJustified(2, '0')  + "_" + QString::number(digi[i]->GetSerialNumber());
       qDebug() << outFileName;
       digi[i]->OpenOutFile(outFileName.toStdString());// overwrite
     }