From c3d70ce7e099657e212faa841879a22f934f4edc Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 6 Jan 2016 08:28:48 +0530
Subject: [PATCH] ...

---
 src/calibre/ebooks/pdf/pdftohtml.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/pdf/pdftohtml.py b/src/calibre/ebooks/pdf/pdftohtml.py
index 3599c4a477..20809e692c 100644
--- a/src/calibre/ebooks/pdf/pdftohtml.py
+++ b/src/calibre/ebooks/pdf/pdftohtml.py
@@ -88,7 +88,7 @@ def pdftohtml(output_dir, pdf_path, no_images, as_xml=False):
         logf.close()
         out = open(logf.name, 'rb').read().strip()
         if ret != 0:
-            raise ConversionError(b'return code: %d\n%s' % (ret, out))
+            raise ConversionError(b'pdftohtml failed with return code: %d\n%s' % (ret, out))
         if out:
             print "pdftohtml log:"
             print out