diff --git a/extras/openslides_gui/gui.py b/extras/openslides_gui/gui.py
index 060eab6a2..e49131efb 100755
--- a/extras/openslides_gui/gui.py
+++ b/extras/openslides_gui/gui.py
@@ -520,6 +520,9 @@ class MainWindow(wx.Frame):
         if not last_backup is None:
             self.last_backup = datetime.datetime.strptime(
                 last_backup, "%Y-%m-%d %H:%M:%S")
+        server_settings = settings.get("server_settings", {})
+        setattr_unless_none("host", server_settings.get("host"))
+        setattr_unless_none("port", server_settings.get("port"))
 
     def save_gui_settings(self):
         if self.last_backup is None:
@@ -534,6 +537,9 @@ class MainWindow(wx.Frame):
                 "interval_unit": self.backupdb_interval_unit,
                 "last_backup": last_backup
             },
+            "server_settings": {
+                "host": self.host,
+                "port": self.port,
         }
 
         dp = os.path.dirname(self.gui_settings_path)
@@ -613,7 +619,10 @@ class MainWindow(wx.Frame):
             self.cmd_run_ctrl.cancel_command()
             return
 
-        args = ["--address", self._host, "--port", self._port]
+        if self._host == "0.0.0.0":
+            args = ["--port", self._port]
+        else:
+            args = ["--address", self._host, "--port", self._port]
         if not self.cb_start_browser.GetValue():
             args.append("--no-browser")
 
diff --git a/openslides/core/templatetags/tags.py b/openslides/core/templatetags/tags.py
index 682bae4c3..6dd6ac7a2 100644
--- a/openslides/core/templatetags/tags.py
+++ b/openslides/core/templatetags/tags.py
@@ -39,7 +39,10 @@ def trans(value):
 def model_url(object, link='view'):
     warnings.warn("model_url is deprecated; use absolute_url instead",
                   DeprecationWarning)
-    return object.get_absolute_url(link)
+    try:
+        return object.get_absolute_url(link)
+    except ValueError:
+        return ''
 
 
 @register.filter
diff --git a/openslides/utils/person/api.py b/openslides/utils/person/api.py
index e063f13b5..312e70d12 100644
--- a/openslides/utils/person/api.py
+++ b/openslides/utils/person/api.py
@@ -51,6 +51,20 @@ class Person(object):
         """
         return ''
 
+    def get_absolute_url(self, link='detail'):
+        """
+        Return an absolute url for the person.
+
+        The argument 'link' affects which url it is. Typically it is one of:
+        * detail
+        * edit
+        * delete
+
+        You should raise an 'ValueError', if your person does not have
+        one of this links.
+        """
+        raise ValueError('This person object has no url.')
+
 
 class Persons(object):
     """
diff --git a/openslides/utils/person/models.py b/openslides/utils/person/models.py
index b74f9c92d..bf271d890 100644
--- a/openslides/utils/person/models.py
+++ b/openslides/utils/person/models.py
@@ -81,7 +81,7 @@ class PersonMixin(object):
                                  % self)
 
     def __unicode__(self):
-        return 'MyPerson: %s' % self.person_id
+        return self.person_id
 
     def prepare_database_save(self, field):
         if type(field) is PersonField:
diff --git a/tests/person_api/models.py b/tests/person_api/models.py
index 22fa3ad31..57793b8e2 100644
--- a/tests/person_api/models.py
+++ b/tests/person_api/models.py
@@ -13,6 +13,9 @@ class TestPerson(PersonMixin, models.Model):
     def __unicode__(self):
         return self.name
 
+    def get_absolute_url(self, link='detail'):
+        return 'absolute_url_of_test_person'
+
 
 class TestPersonToPerson(object):
     def __init__(self, person_prefix_filter=None, id_filter=None):
diff --git a/tests/person_api/tests.py b/tests/person_api/tests.py
index d35b25369..e1e15c237 100644
--- a/tests/person_api/tests.py
+++ b/tests/person_api/tests.py
@@ -15,11 +15,12 @@ from django.db.models.query import EmptyQuerySet
 from django.contrib.auth.models import AnonymousUser
 
 from openslides.utils.test import TestCase
+from openslides.utils.person.api import get_person
 
 from .models import TestPerson, TestModel
 
 
-class ItemTest(TestCase):
+class PersonTest(TestCase):
     def setUp(self):
         self.person1 = TestPerson.objects.create(name='test1')
 
@@ -45,3 +46,12 @@ class ItemTest(TestCase):
                 AttributeError,
                 'You can not save \'<type \'int\'>\' into a person field.'):
             TestModel.objects.create(person=5)
+
+    def test_get_absolute_url_with_deleted_person(self):
+        person2 = TestPerson.objects.create(name='test2')
+        self.assertEqual(person2.get_absolute_url(), 'absolute_url_of_test_person')
+        person_id = person2.person_id
+        self.assertEqual(get_person(person_id).get_absolute_url(), 'absolute_url_of_test_person')
+        person2.delete()
+        with self.assertRaisesRegexp(ValueError, 'This person object has no url.'):
+            get_person(person_id).get_absolute_url()