From 99eb7bf591fac7e870e18ca353cf8882c13ddae4 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 22 Mar 2012 10:32:13 +0530
Subject: [PATCH] ...

---
 src/calibre/gui2/viewer/main.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/calibre/gui2/viewer/main.py b/src/calibre/gui2/viewer/main.py
index c1cb89aeb6..ef3fdfedd8 100644
--- a/src/calibre/gui2/viewer/main.py
+++ b/src/calibre/gui2/viewer/main.py
@@ -507,6 +507,10 @@ class EbookViewer(MainWindow, Ui_EbookViewer):
     def toc_clicked(self, index):
         item = self.toc_model.itemFromIndex(index)
         if item.abspath is not None:
+            if not os.path.exists(item.abspath):
+                return error_dialog(self, _('No such location'),
+                        _('The location pointed to by this item'
+                            ' does not exist.'), show=True)
             url = QUrl.fromLocalFile(item.abspath)
             if item.fragment:
                 url.setFragment(item.fragment)