diff --git a/YACReader/comic.cpp b/YACReader/comic.cpp
index 376729cb..d6c0393d 100644
--- a/YACReader/comic.cpp
+++ b/YACReader/comic.cpp
@@ -242,6 +242,8 @@ QList<QString> FileComic::filter(const QList<QString> & src)
 
 	return filtered;
 }
+
+//DELEGATE methods
 void FileComic::fileExtracted(int index, const QByteArray & rawData)
 {
 	/*QFile f("c:/temp/out2.txt");
@@ -257,6 +259,18 @@ void FileComic::fileExtracted(int index, const QByteArray & rawData)
 	emit imageLoaded(sortedIndex,_pages[sortedIndex]);
 }
 
+void FileComic::crcError(int index)
+{
+	emit errorOpening(tr("CRC error"));
+}
+
+void FileComic::unknownError(int index)
+{
+	emit errorOpening(tr("Unknown error opening the file"));
+}
+
+//--------------------------------------
+
 QList<QVector<quint32> > FileComic::getSections(int & sectionIndex)
 {
 	QVector<quint32> sortedIndexes;
@@ -414,38 +428,7 @@ void FileComic::process()
 	emit imagesLoaded();
 	moveToThread(QApplication::instance()->thread());
 }
-//-----------------------------------------------------------------------------
-void FileComic::loadSizes()
-{
-}
-//-----------------------------------------------------------------------------
-void FileComic::loadImages()
-{
-}
-//-----------------------------------------------------------------------------
-void FileComic::openingError(QProcess::ProcessError error)
-{
-	switch(error)
-	{
-	case QProcess::FailedToStart:
-		QMessageBox::critical(NULL,tr("7z not found"),tr("7z wasn't found in your PATH."));
-		break;
-	case QProcess::Crashed:
-		QMessageBox::critical(NULL,tr("7z crashed"),tr("7z crashed."));
-		break;
-	case QProcess::ReadError:
-		QMessageBox::critical(NULL,tr("7z reading"),tr("problem reading from 7z"));
-		break;
-	case QProcess::UnknownError:
-		QMessageBox::critical(NULL,tr("7z problem"),tr("Unknown error 7z"));
-		break;
-	default:
-		//TODO
-		break;
-	}	
-	_loaded = false;
-	emit errorOpening();
-}
+
 
 ////////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/YACReader/comic.h b/YACReader/comic.h
index 13380cd3..78a15ae0 100644
--- a/YACReader/comic.h
+++ b/YACReader/comic.h
@@ -75,6 +75,7 @@
 		void openAt(int index);
 		void numPages(unsigned int numPages);
 		void errorOpening();
+		void errorOpening(QString);
 		void isBookmark(bool);
 		void bookmarksUpdated();
 		void isCover();
@@ -94,12 +95,10 @@
 		~FileComic();
 		void fileExtracted(int index, const QByteArray & rawData);
 		virtual bool load(const QString & path, int atPage = -1);
-	
+		void crcError(int index);
+		void unknownError(int index);
 	public slots:
 		void process();
-		void loadImages();
-		void loadSizes();
-		void openingError(QProcess::ProcessError error);
 	};
 
 	class FolderComic : public Comic 
diff --git a/compressed_archive/extract_callbacks.h b/compressed_archive/extract_callbacks.h
index ed1f185d..45e8bab2 100644
--- a/compressed_archive/extract_callbacks.h
+++ b/compressed_archive/extract_callbacks.h
@@ -267,21 +267,28 @@ STDMETHODIMP CArchiveExtractCallback::SetOperationResult(Int32 operationResult)
       break;
     default:
     {
-	  //TODO comunicar los fallos usando el delegado
       NumErrors++;
       qDebug() << "     ";
       switch(operationResult)
       {
         case NArchive::NExtract::NOperationResult::kUnSupportedMethod:
+		  if(delegate != 0)
+			  delegate->unknownError(_index);
           qDebug() << kUnsupportedMethod;
           break;
         case NArchive::NExtract::NOperationResult::kCRCError:
+		  if(delegate != 0)
+			  delegate->crcError(_index);
           qDebug() << kCRCFailed;
           break;
         case NArchive::NExtract::NOperationResult::kDataError:
+		  if(delegate != 0)
+			  delegate->unknownError(_index);
           qDebug() << kDataError;
           break;
         default:
+		  if(delegate != 0)
+			  delegate->unknownError(_index);
           qDebug() << kUnknownError;
       }
     }
diff --git a/compressed_archive/extract_delegate.h b/compressed_archive/extract_delegate.h
index 9ab5b318..888d886a 100644
--- a/compressed_archive/extract_delegate.h
+++ b/compressed_archive/extract_delegate.h
@@ -7,6 +7,8 @@ class ExtractDelegate
 {
 	public:
 		virtual void fileExtracted(int index, const QByteArray & rawData) = 0;
+		virtual void crcError(int index) = 0;
+		virtual void unknownError(int index) = 0;
 };
 
 #endif //EXTRACT_DELEGATE_H
\ No newline at end of file