diff --git a/themis/libellioimport/migration.py b/themis/libellioimport/migration.py
index 976de89..d72f7b7 100644
--- a/themis/libellioimport/migration.py
+++ b/themis/libellioimport/migration.py
@@ -14,6 +14,7 @@ from Products.CMFCore.WorkflowCore import WorkflowException
 
 class Migrate(BrowserView):
     def __call__(self):
+        self.logfile = file('/tmp/migration.log', 'a+')
         if self.request['REQUEST_METHOD'] == 'GET':
             filename = self.request.form.get('filename')
             if not filename:
@@ -27,10 +28,11 @@ class Migrate(BrowserView):
         workflow_tool = getToolByName(self.context, 'portal_workflow')
         plone_tool = getToolByName(self.context, 'plone_utils')
 
-        print 'I: Processing', doc.get('id')
+        print 'Processing', doc.get('id')
+        print >> self.logfile, 'I: Processing', doc.get('id')
 
         if doc.get('meta_type') == 'PFBArbitralCourt' and doc.get('id').startswith('cour-d-arbitrage'):
-            print 'I: skipped, arbitral court document'
+            print >> self.logfile, 'I: skipped, arbitral court document'
             return 'Arbitral Court documents are not to be imported\n'
 
         # first step is to create a "courrier entrant" object
@@ -74,7 +76,7 @@ class Migrate(BrowserView):
         }.get(doc.get('meta_type'))]
 
         if ob.categorie_de_courrier is None:
-            print 'W: failed to get a category'
+            print >> self.logfile, 'W: failed to get a category'
 
         ob.expediteur = []
         shipper_id = None
@@ -90,7 +92,7 @@ class Migrate(BrowserView):
                 if doc.get('authors'):
                     shipper_id = self.get_ministry(doc.get('authors')[0])
                 else:
-                    print 'W: document without an author'
+                    print >> self.logfile, 'W: document without an author'
             elif doc.get('meta_type') in ('PFBChallenge',
                             'PFBCurrentEventsQuestion', 'PFBOralRequest',
                             'PFBProposal', 'PFBWriteRequest'):
@@ -98,7 +100,7 @@ class Migrate(BrowserView):
                 if doc.get('authors'):
                     shipper_id = self.get_deputy(doc.get('authors')[0])
                 else:
-                    print 'W: document without an author'
+                    print >> self.logfile, 'W: document without an author'
 
         if shipper_id:
             ob.expediteur.append(shipper_id)
@@ -120,7 +122,7 @@ class Migrate(BrowserView):
             except WorkflowException:
                 pass
             except Exception, e:
-                print 'E: Exception %r' % e
+                print >> self.logfile, 'E: Exception %r' % e
                 raise
 
         second_object_typename = {
@@ -140,7 +142,7 @@ class Migrate(BrowserView):
                 'prop_modif_statut': 'proposition_resolution_modificationD'
             }.get(doc.get('type'))
             if second_object_typename is None:
-                print 'W: proposal of unknown type'
+                print >> self.logfile, 'W: proposal of unknown type'
 
         if second_object_typename:
             # XXX: this is a temporary location, no decision has been taken yet
@@ -183,7 +185,7 @@ class Migrate(BrowserView):
                 except WorkflowException:
                     pass
                 except Exception, e:
-                    print 'E: Exception(b) %r' % e
+                    print >> self.logfile, 'E: Exception(b) %r' % e
                     raise
 
 
@@ -201,7 +203,11 @@ class Migrate(BrowserView):
             return 'ministry:college'
         if not portal.ministres.has_key(author_id):
             workflow_tool = getToolByName(self.context, 'portal_workflow')
-            lastname, firstname = author.split(',')
+            try:
+                lastname, firstname = author.split(',')
+            except ValueError:
+                print >> self.logfile, 'E: ministry??? (%r)' % author
+                raise
             portal.ministres.invokeFactory('themis.datatypes.ministry', author_id,
                             firstname=firstname.strip(),
                             lastname=lastname.strip())
@@ -218,11 +224,17 @@ class Migrate(BrowserView):
         portal = getToolByName(self.context, 'portal_url').getPortalObject()
         author = unicode(author, 'utf-8')
         if len(author.split()) > 3:
-            print 'W: author with (too?) many parts:', author
+            if not 'Warnaffe' in author and \
+                not 'Jonghe' in author:
+                print >> self.logfile, 'W: author with (too?) many parts: %r' % author
         author_id = plone_tool.normalizeString(author)
         if not portal.deputes.has_key(author_id):
             workflow_tool = getToolByName(self.context, 'portal_workflow')
-            lastname, firstname = author.split(',')
+            try:
+                lastname, firstname = author.split(',')
+            except ValueError:
+                print >> self.logfile, 'E: deputy??? (%r)' % author
+                raise
             portal.deputes.invokeFactory('themis.datatypes.deputy', author_id,
                             firstname=firstname.strip(),
                             lastname=lastname.strip())