diff --git a/source/app/ModulesHandle.cpp b/source/app/ModulesHandle.cpp
index 6747086..22116e3 100644
--- a/source/app/ModulesHandle.cpp
+++ b/source/app/ModulesHandle.cpp
@@ -172,10 +172,10 @@ Void ModulesHandle::destroyAllModulesIf()
   }
 }
 
-PlaYUVerFrame* ModulesHandle::applyModuleIf( PlaYUVerModuleIf *pcCurrModuleIf )
+Bool ModulesHandle::applyModuleIf( PlaYUVerModuleIf *pcCurrModuleIf )
 {
   PlaYUVerFrame* processedFrame = NULL;
-
+  Bool bRet = false;
   switch( pcCurrModuleIf->m_cModuleDef.m_uiNumberOfFrames )
   {
   case MODULE_REQUIRES_ONE_FRAME:
@@ -190,10 +190,15 @@ PlaYUVerFrame* ModulesHandle::applyModuleIf( PlaYUVerModuleIf *pcCurrModuleIf )
     break;
   }
   if( pcCurrModuleIf->m_pcDisplaySubWindow )
+  {
     pcCurrModuleIf->m_pcDisplaySubWindow->setCurrFrame( processedFrame );
+    bRet = true;
+  }
   else
+  {
     pcCurrModuleIf->m_pcSubWindow[0]->setCurrFrame( processedFrame );
-  return processedFrame;
+  }
+  return bRet;
 }
 
 QMenu* ModulesHandle::createMenus( QMenuBar *MainAppMenuBar )
diff --git a/source/app/ModulesHandle.h b/source/app/ModulesHandle.h
index d5c4edd..5ed1746 100644
--- a/source/app/ModulesHandle.h
+++ b/source/app/ModulesHandle.h
@@ -55,7 +55,7 @@ public:
   Void updateMenus( Bool hasSubWindow );
   SubWindowHandle* toggleSelectedModuleIf();
 
-  static PlaYUVerFrame* applyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf );
+  static Bool applyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf );
   static Void destroyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf );
 
 private:
diff --git a/source/app/SubWindowHandle.cpp b/source/app/SubWindowHandle.cpp
index 0799795..bded3e4 100644
--- a/source/app/SubWindowHandle.cpp
+++ b/source/app/SubWindowHandle.cpp
@@ -143,14 +143,15 @@ Void SubWindowHandle::setCurrFrame( PlaYUVerFrame* pcCurrFrame )
 
 Void SubWindowHandle::refreshFrame()
 {
+  Bool bSetFrame = true;
   if( m_pCurrStream )
   {
     m_pcCurrFrame = m_pCurrStream->getCurrFrame();
     if( m_pcCurrentModule )
     {
-      ModulesHandle::applyModuleIf( m_pcCurrentModule );
+      bSetFrame = ModulesHandle::applyModuleIf( m_pcCurrentModule );
     }
-    else
+    if( bSetFrame )
     {
       m_cViewArea->setImage( m_pcCurrFrame );
     }