diff --git a/app/SubWindowHandle.cpp b/app/SubWindowHandle.cpp
index 4bb7f9e..50c8523 100644
--- a/app/SubWindowHandle.cpp
+++ b/app/SubWindowHandle.cpp
@@ -60,6 +60,8 @@ SubWindowHandle::SubWindowHandle( QWidget * parent, Bool isModule ) :
   m_cScrollArea->setWidget( m_cViewArea );
   m_cScrollArea->setWidgetResizable( true );
 
+  m_pCurrStream = new PlaYUVerStream;
+
   m_cWindowName = QString( " " );
   m_cLastScroll = QPoint();
 }
@@ -69,8 +71,7 @@ SubWindowHandle::~SubWindowHandle()
   disableModule();
   delete m_cViewArea;
   delete m_cScrollArea;
-  if( m_pCurrStream )
-    delete m_pCurrStream;
+  delete m_pCurrStream;
 }
 
 Void SubWindowHandle::reloadFile()
@@ -85,11 +86,6 @@ Bool SubWindowHandle::loadFile( QString cFilename, Bool bForceDialog )
   UInt Width = 0, Height = 0, FrameRate = 30;
   Int InputFormat = -1;
 
-  if( !m_pCurrStream )
-  {
-    m_pCurrStream = new PlaYUVerStream;
-  }
-
   m_pCurrStream->getFormat( Width, Height, InputFormat, FrameRate );
 
   if( m_pCurrStream->guessFormat( cFilename, Width, Height, InputFormat, FrameRate ) || bForceDialog )
@@ -102,10 +98,8 @@ Bool SubWindowHandle::loadFile( QString cFilename, Bool bForceDialog )
   }
   QApplication::setOverrideCursor( Qt::WaitCursor );
   QApplication::restoreOverrideCursor();
-  if( !m_pCurrStream->open( cFilename, Width, Height, InputFormat, FrameRate ) )
-  {
-    return false;
-  }
+
+  m_pCurrStream->open( cFilename, Width, Height, InputFormat, FrameRate );
 
   m_cViewArea->setInputStream( m_pCurrStream );
 
@@ -117,16 +111,12 @@ Bool SubWindowHandle::loadFile( QString cFilename, Bool bForceDialog )
   m_cWindowName = m_pCurrStream->getStreamInformationString();
   m_cWindowShortName = QFileInfo( cFilename ).fileName();
   setWindowTitle( m_cWindowName );
+  qDebug() << "File " << m_cWindowName << "was successfully opened";
   return true;
 }
 
 Bool SubWindowHandle::loadFile( PlaYUVerStreamInfo* streamInfo )
 {
-  if( !m_pCurrStream )
-  {
-    m_pCurrStream = new PlaYUVerStream;
-  }
-
   if( !m_pCurrStream->open( streamInfo->m_cFilename, streamInfo->m_uiWidth, streamInfo->m_uiHeight, streamInfo->m_iPelFormat,
       streamInfo->m_uiFrameRate ) )
   {
diff --git a/app/plaYUVerApp.cpp b/app/plaYUVerApp.cpp
index 2270ee4..9e8fb69 100644
--- a/app/plaYUVerApp.cpp
+++ b/app/plaYUVerApp.cpp
@@ -167,19 +167,19 @@ Void plaYUVerApp::loadFile( QString fileName, PlaYUVerStreamInfo* streamInfo )
     return;
   }
   interfaceChild = new SubWindowHandle( this );  //createSubWindow();
-  Bool retChild = false;
   if( !streamInfo )
   {
     Int idx = findPlaYUVerStreamInfo( m_aRecentFileStreamInfo, fileName );
     streamInfo = ( PlaYUVerStreamInfo* )( idx >= 0 ? &m_aRecentFileStreamInfo.at( idx ) : NULL );
   }
 
-  if( !streamInfo )
-    retChild = interfaceChild->loadFile( fileName );
-  else
-    retChild = interfaceChild->loadFile( streamInfo );
-  if( retChild )
+  try
   {
+    if( !streamInfo )
+      interfaceChild->loadFile( fileName );
+    else
+      interfaceChild->loadFile( streamInfo );
+
     statusBar()->showMessage( tr( "Loading file..." ) );
     mdiArea->addSubWindow( interfaceChild );
     interfaceChild->show();
@@ -197,18 +197,18 @@ Void plaYUVerApp::loadFile( QString fileName, PlaYUVerStreamInfo* streamInfo )
       m_aRecentFileStreamInfo.remove( idx );
     m_aRecentFileStreamInfo.prepend( interfaceChild->getStreamInfo() );
     while( m_aRecentFileStreamInfo.size() > MAX_RECENT_FILES )
-//#if( QT_VERSION_PLAYUVER == 5)
-//      m_aRecentFileStreamInfo.removeLast();
-//#else
       m_aRecentFileStreamInfo.remove( m_aRecentFileStreamInfo.size() - 1 );
-//#endif
     updateRecentFileActions();
 
     statusBar()->showMessage( tr( "File loaded" ), 2000 );
   }
-  else
+  catch( const char *msg )
   {
     interfaceChild->close();
+    QString warningMsg = "Cannot open file " + QFileInfo( fileName ).fileName() + " with the following error: \n" + msg;
+    QMessageBox::warning( this, QApplication::applicationName(), warningMsg );
+    statusBar()->showMessage( warningMsg, 2000 );
+    qDebug() << warningMsg;
   }
 }
 
@@ -306,7 +306,18 @@ Void plaYUVerApp::format()
 {
   if( m_pcCurrentSubWindow )
   {
-    m_pcCurrentSubWindow->loadFile( m_pcCurrentSubWindow->getCurrentFileName(), true );
+    try
+    {
+      m_pcCurrentSubWindow->loadFile( m_pcCurrentSubWindow->getCurrentFileName(), true );
+    }
+    catch( const char *msg )
+    {
+      QString warningMsg = "Cannot change format of " + QFileInfo( m_pcCurrentSubWindow->getCurrentFileName() ).fileName() + " with the following error: \n" + msg;
+      QMessageBox::warning( this, QApplication::applicationName(), warningMsg );
+      statusBar()->showMessage( warningMsg, 2000 );
+      qDebug() << warningMsg;
+      m_pcCurrentSubWindow->close();
+    }
     m_pcCurrentSubWindow = NULL;
     chageSubWindowSelection();
   }
diff --git a/lib/PlaYUVerDefs.h b/lib/PlaYUVerDefs.h
index 96d64c7..c1b3020 100644
--- a/lib/PlaYUVerDefs.h
+++ b/lib/PlaYUVerDefs.h
@@ -126,26 +126,6 @@ enum RGBcomponent
   COLOR_B,
 };
 
-//typedef struct __pixel_definition
-//{
-//  Int color_space;
-//  union
-//  {
-//    Pel Luma;
-//    Pel ColorR;
-//  };
-//  union
-//  {
-//    Pel ChromaU;
-//    Pel ColorG;
-//  };
-//  union
-//  {
-//    Pel ChromaV;
-//    Pel ColorB;
-//  };
-//}Pixel;
-
 }  // NAMESPACE
 
 #endif // __TYPEDEF_H__
diff --git a/lib/PlaYUVerFramePixelFormats.cpp b/lib/PlaYUVerFramePixelFormats.cpp
index 62149ba..7079789 100644
--- a/lib/PlaYUVerFramePixelFormats.cpp
+++ b/lib/PlaYUVerFramePixelFormats.cpp
@@ -340,7 +340,7 @@ PlaYUVerFramePelFormat g_PlaYUVerFramePelFormatsList[PLAYUVER_NUMBER_FORMATS] =
   yuv422p,
   yuyv422,
   gray,
-  rgb24,
+  /*rgb24,*/
   BGR24, };
 
 
diff --git a/lib/PlaYUVerFramePixelFormats.h b/lib/PlaYUVerFramePixelFormats.h
index 27951fa..5e8dfe0 100644
--- a/lib/PlaYUVerFramePixelFormats.h
+++ b/lib/PlaYUVerFramePixelFormats.h
@@ -102,7 +102,7 @@ struct structPlaYUVerFramePelFormat
 
 typedef struct structPlaYUVerFramePelFormat PlaYUVerFramePelFormat;
 
-#define PLAYUVER_NUMBER_FORMATS 7
+#define PLAYUVER_NUMBER_FORMATS 6
 extern PlaYUVerFramePelFormat g_PlaYUVerFramePelFormatsList[PLAYUVER_NUMBER_FORMATS];
 
 }  // NAMESPACE
diff --git a/lib/PlaYUVerStream.cpp b/lib/PlaYUVerStream.cpp
index bfae19a..d89f72d 100644
--- a/lib/PlaYUVerStream.cpp
+++ b/lib/PlaYUVerStream.cpp
@@ -139,6 +139,7 @@ Bool PlaYUVerStream::open( QString filename, UInt width, UInt height, Int input_
     if( m_iFileFormat == INVALID_INPUT )
     {
       close();
+      throw "Invalid file format";
       return m_bInit;
     }
     m_cFormatName = PlaYUVerStream::supportedReadFormatsExt().at( m_iFileFormat ).toUpper();
@@ -171,8 +172,8 @@ Bool PlaYUVerStream::open( QString filename, UInt width, UInt height, Int input_
 
   if( m_uiWidth <= 0 || m_uiHeight <= 0 || m_iPixelFormat < 0 )
   {
-    qDebug( ) << "Incorrect configuration";
     close();
+    throw "[PlaYUVerStream] Incorrect configuration";
     return m_bInit;
   }
 
@@ -182,8 +183,8 @@ Bool PlaYUVerStream::open( QString filename, UInt width, UInt height, Int input_
     m_ppcFrameBuffer[i] = new PlaYUVerFrame( m_uiWidth, m_uiHeight, m_iPixelFormat );
     if( !m_ppcFrameBuffer[i] )
     {
-      qDebug( ) << "Cannot allocated frame buffer";
       close();
+      throw "[PlaYUVerStream] Cannot allocated frame buffer";
       return m_bInit;
     }
   }
@@ -197,6 +198,7 @@ Bool PlaYUVerStream::open( QString filename, UInt width, UInt height, Int input_
     if( !openFile() )
     {
       close();
+      throw "[PlaYUVerStream] Cannot open file";
       return m_bInit;
     }
     m_cFormatName = QString::fromUtf8( "YUV" );
@@ -213,8 +215,8 @@ Bool PlaYUVerStream::open( QString filename, UInt width, UInt height, Int input_
       if( fileSize % frame_bytes_input )
       {
         Int remaining = fileSize % frame_bytes_input;
-        qDebug( ) << "Incorrect configuration: failed ( fileSize % frame_bytes_input = " << remaining << " )";
         close();
+        throw "[PlaYUVerStream] Incorrect configuration: failed ( fileSize % frame_bytes_input = " << remaining << " )";
         return m_bInit;
       }
 #endif
@@ -226,25 +228,20 @@ Bool PlaYUVerStream::open( QString filename, UInt width, UInt height, Int input_
 
   if( m_bIsInput && m_uiTotalFrameNum <= 0 )
   {
-    qDebug( ) << "Incorrect configuration: less than one frame";
     close();
+    throw "[PlaYUVerStream] Incorrect configuration: less than one frame";
     return m_bInit;
   }
 
   if( !getMem1D<Pel>( &m_pStreamBuffer, m_pcCurrFrame->getBytesPerFrame() ) )
   {
     close();
+    throw "[PlaYUVerStream] Cannot allocated memory";
     return m_bInit;
   }
 
-  m_cStreamInformationString = QString( "[" );
-  m_cStreamInformationString.append( m_cFormatName );
-  m_cStreamInformationString.append( QString( " / " ) );
-  m_cStreamInformationString.append( m_cCodedName );
-  m_cStreamInformationString.append( QString( " / " ) );
-  m_cStreamInformationString.append( PlaYUVerFrame::supportedPixelFormatListNames().at( m_iPixelFormat ) );
-  m_cStreamInformationString.append( "] " );
-  m_cStreamInformationString.append( QFileInfo( m_cFilename ).fileName() );
+  m_cStreamInformationString = "[" + m_cFormatName + " / " + m_cCodedName + " / " + PlaYUVerFrame::supportedPixelFormatListNames().at( m_iPixelFormat ) + "] "
+          + QFileInfo( m_cFilename ).fileName();
 
   m_sStreamInfo.m_cFilename = m_cFilename;
   m_sStreamInfo.m_uiWidth = m_uiWidth;
@@ -387,7 +384,6 @@ Bool PlaYUVerStream::guessFormat( QString filename, UInt& rWidth, UInt& rHeight,
         {
           resolutionString.remove( "_" );
           QStringList resolutionArgs = resolutionString.split( "x" );
-          qDebug( ) << "Found resolution = " << resolutionArgs;
           if( resolutionArgs.size() == 2 )
           {
             rWidth = resolutionArgs.at( 0 ).toUInt();