diff --git a/themis/ocrloader/ocrloader.py b/themis/ocrloader/ocrloader.py
index 1003959..74bc0c4 100644
--- a/themis/ocrloader/ocrloader.py
+++ b/themis/ocrloader/ocrloader.py
@@ -2,6 +2,7 @@
 
 import datetime
 import os
+import logging
 
 from Products.CMFCore.utils import getToolByName
 from Products.Five.browser import BrowserView
@@ -11,6 +12,8 @@ import transaction
 
 import themis.config.utils
 
+log = logging.getLogger('Plone')
+
 class LoadFromOcr(BrowserView):
     output_path = '/mnt/gedimport'
 
@@ -33,8 +36,13 @@ class LoadFromOcr(BrowserView):
             for filename in filenames:
                 if not filename.lower().endswith('.pdf'):
                     continue
-                print 'processing', filename
-                code_cat, number, date, time = filename.split('_')
+                log.info('processing %s' % filename)
+                try:
+                    code_cat, number, date, time = filename.split('_')
+                except ValueError:
+                    # XXX: log
+                    log.warning('unknown file name format (%s)' % filename)
+                    continue
 
                 for doctype in ('incoming_mails', 'outgoing_mails',
                                 'internal_documents', 'confidential_documents'):
@@ -45,7 +53,7 @@ class LoadFromOcr(BrowserView):
                         continue
                     break
                 else:
-                    # XXX: log?
+                    log.warning('no suitable document type found for %s' % filename)
                     continue
 
                 folder = self.get_folder(doctype)
@@ -78,7 +86,7 @@ class LoadFromOcr(BrowserView):
                                 ocr_date.strftime('%H-%M-%S')))
 
                 if hasattr(folder, ocr_id):
-                    # already imported (log?)
+                    logging.warning('document id already exists (%s)' % filename)
                     continue
 
                 if category: