From ff9173ac297169ffd5645b596835cbba6cb93d2c Mon Sep 17 00:00:00 2001
From: Roberto Rosario <Roberto.Rosario.Gonzalez@gmail.com>
Date: Thu, 31 Mar 2011 23:57:24 -0400
Subject: [PATCH] Raise ImportError and notify user when specifying a non
 existant converter graphics backend

---
 apps/converter/api.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/apps/converter/api.py b/apps/converter/api.py
index 4347bae6f6..5b72b4a043 100644
--- a/apps/converter/api.py
+++ b/apps/converter/api.py
@@ -43,8 +43,11 @@ def _lazy_load(fn):
 @_lazy_load
 def _get_backend():
     return import_module(GRAPHICS_BACKEND)
-    
-backend = _get_backend()
+
+try:    
+    backend = _get_backend()
+except ImportError:
+    raise ImportError('Missing or incorrect converter backend: %s' % GRAPHICS_BACKEND)
 
 def cleanup(filename):
     ''' tries to remove the given filename. Ignores non-existent files '''