diff --git a/ckanext/geonetwork/harvesters/geonetwork.py b/ckanext/geonetwork/harvesters/geonetwork.py
index ad49892..3d2d050 100644
--- a/ckanext/geonetwork/harvesters/geonetwork.py
+++ b/ckanext/geonetwork/harvesters/geonetwork.py
@@ -13,12 +13,12 @@
 from ckanext.spatial.lib.csw_client import CswService
 from ckanext.spatial.harvesters.csw import CSWHarvester
 
-from ckanext.spatial.model import ISODocument
-from ckanext.spatial.model import ISOElement
+from ckanext.spatial.harvested_metadata import ISODocument
+from ckanext.spatial.harvested_metadata import ISOElement
 
 from ckan.logic import ValidationError, NotFound, get_action
 
-from pylons import config
+from ckan.common import config
 from datetime import datetime
 
 log = logging.getLogger(__name__)
@@ -80,7 +80,7 @@ def get_package_dict(self, iso_values, harvest_object):
 
             existing_keys = [entry.get('key') for entry in package_dict['extras']]
 
-            for key, value in default_extras.iteritems():
+            for key, value in default_extras.items():
                 log.debug('Processing extra %s', key)
                 if not key in existing_keys or override_extras:
                     # Look for replacement strings
@@ -163,8 +163,10 @@ def handle_groups(self, harvest_object, group_mapping, gn_localized_url, values)
                 version = self.source_config.get('version')
                 client = GeoNetworkClient(gn_localized_url, version)
                 cats = client.retrieveMetadataCategories(harvest_object.guid)
+                log.info(':::::::::::::-TOPIC-CATEGORY-::::::::::::: %r ', cats)
             
             for cat in cats:
+                log.info('group_mapping %r', group_mapping.items())
                 groupname = group_mapping[cat]
 
                 printname = groupname if not None else "NONE"
@@ -172,6 +174,7 @@ def handle_groups(self, harvest_object, group_mapping, gn_localized_url, values)
 
                 if groupname:
                     try:
+                        log.info('groupname1 %r', groupname)
                         data_dict = {'id': groupname}
                         get_action('group_show')(context, data_dict)
                         #log.info('Group %s found %s' % (groupname, group))
@@ -180,10 +183,11 @@ def handle_groups(self, harvest_object, group_mapping, gn_localized_url, values)
                         #else:
                         #validated_groups.append(group['id'])
                         validated_groups.append({'name': groupname})
-                    except NotFound, e:
+                    except NotFound as e:
                         log.warning('Group %s from category %s is not available' % (groupname, cat))
-        except Exception, e:
-            log.warning('Error handling groups for metadata %s' % harvest_object.guid)
+        except Exception as e:
+            # log.warning('Error handling groups for metadata %s' % harvest_object.guid)
+            log.warning('Error handling groups for metadata %r', e)
 
         return validated_groups
 
diff --git a/ckanext/geonetwork/harvesters/utils.py b/ckanext/geonetwork/harvesters/utils.py
index 31d1f7d..899550f 100644
--- a/ckanext/geonetwork/harvesters/utils.py
+++ b/ckanext/geonetwork/harvesters/utils.py
@@ -2,9 +2,9 @@
 import logging
 #import re
 import urllib
-import urllib2
+import urllib.request
 import zipfile
-from StringIO import StringIO
+import io
 from lxml import etree
 
 GEONETWORK_V26 = "2.6"
@@ -27,26 +27,29 @@ def __init__(self, base, version):
     def retrieveInfo(self, uuid):
 
         if self.version == GEONETWORK_V26:
-            url = "%s/srv/en/mef.export" % self.base
+            # url = "%s/srv/en/mef.export" % self.base
+            url = "%smef.export?uuid=%s" % (self.base, uuid)
+
+            logger.info('URL %r ', url)
+
             #headers = {
-                #"Content-Type": "application/x-www-form-urlencoded",
-                #"Accept": "text/plain"
-            #}
-            query = urllib.urlencode({
-                "uuid": uuid
-            })
+            #    "Content-Type": "application/x-www-form-urlencoded",
+            #    "Accept": "text/plain"
+            
+            #query = urllib.parse.urlencode({
+            #    "uuid": uuid
+            #}).encode('utf-8')
+
+            request = urllib.request.Request(url, method='GET')
 
-            logger.info('Loading MEF for %s', uuid)
-            request = urllib2.Request(url, query)
-            opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(), urllib2.HTTPRedirectHandler())
+            opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(), urllib.request.HTTPRedirectHandler())
 
             response = opener.open(request)  # will get a ZIP file
             content = response.read()
-
-            #logger.info('----> %s', content)
+                
             #print 'RESPONSE ', content
 
-            zdata = StringIO(content)
+            zdata = io.BytesIO(content)
             zfile = zipfile.ZipFile(zdata)
 
             xml = None
@@ -54,19 +57,20 @@ def retrieveInfo(self, uuid):
             for name in zfile.namelist():
                 #logger.info(' MEF entry: %s', name)
                 #print ' MEF entry: ', name
-                if name == 'info.xml':
+                if name == 'metadata.xml':
                     uncompressed = zfile.read(name)
                     xml = etree.fromstring(uncompressed)
-
+            
             return xml
 
     def retrieveMetadataCategories(self, uuid):
         xml = self.retrieveInfo(uuid)
-
         cats = []
 
-        for cat in xml.findall('categories/category'):
-            cats.append(cat.get('name'))
+        for cat in xml.iter('{http://www.isotc211.org/2005/gmd}MD_TopicCategoryCode'):
+            cat = cat.text
+            logger.info('cat %r', cat)
+            cats.append(cat)
 
         return cats