...

src/calibre/library/catalog.py

@@ -6,7 +6,7 @@ from calibre.ebooks.BeautifulSoup import BeautifulSoup, BeautifulStoneSoup, Tag,
 from calibre.customize import CatalogPlugin
 from calibre.ptempfile import PersistentTemporaryDirectory
 from calibre.customize.conversion import OptionRecommendation, DummyReporter
-
+from calibre import filesystem_encoding
 
 FIELDS = ['all', 'author_sort', 'authors', 'comments',
           'cover', 'formats', 'id', 'isbn', 'pubdate', 'publisher', 'rating',
@@ -377,7 +377,10 @@ class EPUB_MOBI(CatalogPlugin):
                 self.text = ''.join(result)
 
             else:
+                try:
                     number = int(self.number)
+                except:
+                    return
 
                 if number > 1000000:
                     self.text = "%d out of range" % number
@@ -2453,12 +2456,14 @@ class EPUB_MOBI(CatalogPlugin):
 
         def generateThumbnail(self, title, image_dir, thumb_file):
             import calibre.utils.PythonMagickWand as pw
+            with pw.ImageMagick():
                 try:
                     img = pw.NewMagickWand()
                     if img < 0:
                         raise RuntimeError('generate_thumbnail(): Cannot create wand')
                     # Read the cover
-                if not pw.MagickReadImage(img, title['cover']):
+                    if not pw.MagickReadImage(img,
+                            title['cover'].encode(filesystem_encoding)):
                         print 'Failed to read cover image from: %s' % title['cover']
                         raise IOError
                     thumb = pw.CloneMagickWand(img)