From a8a98dfeb1860c7c462d0fae1f46fd6d0a14989b Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 11 Oct 2013 18:27:59 +0530
Subject: [PATCH] Fix #1238636 [Calibre 1.6 / Find Duplicates Plugin /ERROR:
 Unhandled exception: <b>ValueError</b>:tuple.index(x): x not in
 tuple](https://bugs.launchpad.net/calibre/+bug/1238636)

---
 src/calibre/gui2/library/alternate_views.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/calibre/gui2/library/alternate_views.py b/src/calibre/gui2/library/alternate_views.py
index 68ebe74ba1..a3885bf135 100644
--- a/src/calibre/gui2/library/alternate_views.py
+++ b/src/calibre/gui2/library/alternate_views.py
@@ -827,6 +827,9 @@ class GridView(QListView):
         changed = old_marked | current_marked
         m = self.model()
         for book_id in changed:
-            self.update(m.index(m.db.data.id_to_index(book_id), 0))
+            try:
+                self.update(m.index(m.db.data.id_to_index(book_id), 0))
+            except ValueError:
+                pass
 
 # }}}