Index: sources/storage/logger.cpp
===================================================================
diff -u -r057d3ef4e29c63235040c5cfe8c6421ef7787d6a -rae97f70129df818530bcb70c934c42fa28eb6034
--- sources/storage/logger.cpp	(.../logger.cpp)	(revision 057d3ef4e29c63235040c5cfe8c6421ef7787d6a)
+++ sources/storage/logger.cpp	(.../logger.cpp)	(revision ae97f70129df818530bcb70c934c42fa28eb6034)
@@ -65,10 +65,13 @@
  */
 bool Logger::init(QThread &vThread)
 {
+    // coco begin validated: Application is not running in multi-threaded mode for testing
+    // it has been tested and works perfectly fine in normal run.
     if ( ! init() ) return false;
     initThread(vThread);
     return true;
 }
+// coco end
 
 /*!
  * \brief   Logger quit
@@ -79,6 +82,7 @@
 {
     // coco begin validated: Application termination is not correctly done in coco!!!
     // it has been tested and works perfectly fine in normal run.
+    qDebug() << "void Logger::quit()";
     quitThread();
 }
 // coco end
@@ -112,6 +116,8 @@
  */
 void Logger::initThread(QThread &vThread)
 {
+    // coco begin validated: Application is not running in multi-threaded mode for testing
+    // it has been tested and works perfectly fine in normal run.
     // runs in main thread
     Q_ASSERT_X(QThread::currentThread() == qApp->thread() , __func__, "The Class initialization must be done in Main Thread" );
     _thread = &vThread;
@@ -120,7 +126,7 @@
     _thread->start();
     moveToThread(_thread);
 }
-
+// coco end
 /*!
  * \brief   Logger::quitThread
  * \details Moves this object to main thread to be handled by QApplicaiton
@@ -130,7 +136,6 @@
 {
     // coco begin validated: Application termination is not correctly done in coco!!!
     // it has been tested and works perfectly fine in normal run.
-
     if (! _thread) return;
 
     // runs in thread
@@ -145,7 +150,10 @@
 void Logger::checkLogPath()
 {
     setLogBasePath();           // try to use /media/sd_card on device
+    // coco begin validated: It can only happen if the file system is readonly for any reson.
+    // it has been tested and works perfectly fine in normal run.
     if (! setLogPath()) {       // check and create log folders & if unsuccessful then
+        // coco end
         setLogBasePath(true);   // try to use application folder
         setLogPath    (    );   // check and create log folders // Note: it may require to check for write access regarding device setup
     }
@@ -176,9 +184,9 @@
 bool Logger::setLogPath()
 {
     bool ok = true;
-    ok = ok && setLogPath(LogType::eLogEvent);
-    ok = ok && setLogPath(LogType::eLogError);
-    ok = ok && setLogPath(LogType::eLogDatum);
+    if ( ! setLogPath(LogType::eLogEvent) ) ok = false;
+    if ( ! setLogPath(LogType::eLogError) ) ok = false;
+    if ( ! setLogPath(LogType::eLogDatum) ) ok = false;
     return ok;
 }
 
@@ -227,12 +235,17 @@
         LOG_ERROR(tr("Incorrect type of logging").arg(vLogType));
     }
 
-    mContent += _logPrefix[vLogType];
+    QString logPrefix = _logPrefix[vLogType];
+    if (logPrefix.isEmpty()) logPrefix = _logPrefix[LogType::eLogError];
+    mContent += logPrefix;
     mContent += _prefixSeparator;
     mContent += QTime::currentTime().toString(_timeFormat);
     mContent += _timeSeparator + vContent;
     QString fileName = date + _dateSeparator + Log_File_Name;
-    _logFileName = _logPathNames[vLogType] + fileName;
+    QString logPathName = _logPathNames[vLogType];
+    if (logPathName.isEmpty())
+        logPathName = _logPathNames[LogType::eLogError];
+    _logFileName = logPathName + fileName;
     FileHandler::write(_logFileName, mContent + "\r\n", true);
     if (vLogType == eLogError) {
 #ifdef QT_DEBUG