--- a/QTfrontend/util/FileEngine.h	Mon Jun 10 11:05:10 2013 +0200
+++ b/QTfrontend/util/FileEngine.h	Mon Jun 10 21:20:14 2013 +0400
@@ -71,6 +71,7 @@
         static void mount(const QString & path, const QString & mountPoint);
         static void setWriteDir(const QString & path);
         static void mountPacks();
+        static QString errorStr();
 
 //    private:
         static const QString scheme;