diff --git a/pywb/warcserver/index/cdxobject.py b/pywb/warcserver/index/cdxobject.py index b470e87b..ed5b79c3 100644 --- a/pywb/warcserver/index/cdxobject.py +++ b/pywb/warcserver/index/cdxobject.py @@ -149,7 +149,7 @@ class CDXObject(OrderedDict): cdxformat = i if not cdxformat: - msg = 'unknown {0}-field cdx format'.format(len(fields)) + msg = 'unknown {0}-field cdx format: {1}'.format(len(fields), fields) raise CDXException(msg) for header, field in zip(cdxformat, fields):