diff --git a/billard/tasks.py b/billard/tasks.py
index 0f2ecfc..5fc22dd 100644
--- a/billard/tasks.py
+++ b/billard/tasks.py
@@ -11,52 +11,55 @@ log = logging.getLogger(__name__)
 def process_location_data():
     data = LocationData.objects.filter(processed=False).order_by('tst')
     for ld in data:
-        cli = Client.objects.filter(uuid=ld.client_id, desks__desk_no=ld.desk_no)
-        if cli.count() < 1:
-            ld.processed = True
-            ld.error_msg = 'No client object found. Stopp processing! {}, {}'.format(ld.client_id, ld.desk_no)
-            ld.save()
-            log.error(ld.error_msg)
-        else:
-            cli = cli[0]
-            desk = cli.desks.filter(desk_no=ld.desk_no, enabled=True)
-            if desk.count() != 1:
+        try:
+            cli = Client.objects.filter(uuid=ld.client_id, desks__desk_no=ld.desk_no)
+            if cli.count() < 1:
                 ld.processed = True
-                ld.error_msg = 'No desk object found. Stopp processing! {}, {}'.format(ld.client_id, ld.desk_no)
+                ld.error_msg = 'No client object found. Stopp processing! {}, {}'.format(ld.client_id, ld.desk_no)
                 ld.save()
                 log.error(ld.error_msg)
-            desk = desk[0]
-            ac = desk.accounting_set.order_by('time_from').reverse()
-            if ld.on_off:
-                acc = None
-                if ac.count() > 0 and ac[0].time_to is None:
-                    log.error('Vorheriges Accounting nicht abgeschlossen: Desk_id {}, Accounting_id {}'
-                              .format(desk.id, ac[0].id))
-                    acc = ac[0]
-                if acc is None:
-                    acc = Accounting(
-                        desk=desk,
-                        time_from=ld.tst,
-                    )
-                acc.save()
-                ld.delete()
             else:
-                if len(ac) > 0:
-                    acc = ac[0]
-                    acc.time_to = ld.tst
-                    acc.prize, acc.prize_normal, acc.prize_hh = utils.get_prize_for(
-                        start=acc.time_from,
-                        end=ld.tst,
-                        pph=desk.prize,
-                        hh_start=cli.location.happy_hour_start,
-                        hh_end=cli.location.happy_hour_end,
-                        pphh=desk.prize_hh,
-                    )
-                    acc.reporter_uuid = cli.uuid
+                cli = cli[0]
+                desk = cli.desks.filter(desk_no=ld.desk_no, enabled=True)
+                if desk.count() != 1:
+                    ld.processed = True
+                    ld.error_msg = 'No desk object found. Stopp processing! {}, {}'.format(ld.client_id, ld.desk_no)
+                    ld.save()
+                    log.error(ld.error_msg)
+                desk = desk[0]
+                ac = desk.accounting_set.order_by('time_from').reverse()
+                if ld.on_off:
+                    acc = None
+                    if ac.count() > 0 and ac[0].time_to is None:
+                        log.error('Vorheriges Accounting nicht abgeschlossen: Desk_id {}, Accounting_id {}'
+                                  .format(desk.id, ac[0].id))
+                        acc = ac[0]
+                    if acc is None:
+                        acc = Accounting(
+                            desk=desk,
+                            time_from=ld.tst,
+                        )
                     acc.save()
                     ld.delete()
                 else:
-                    ld.processed = True
-                    ld.error_msg = 'No existing accountings found. Stopp processing! {}, {}'.format(ld.client_id, ld.desk_no)
-                    ld.save()
-                    log.error(ld.error_msg)
+                    if len(ac) > 0:
+                        acc = ac[0]
+                        acc.time_to = ld.tst
+                        acc.prize, acc.prize_normal, acc.prize_hh = utils.get_prize_for(
+                            start=acc.time_from,
+                            end=ld.tst,
+                            pph=desk.prize,
+                            hh_start=cli.location.happy_hour_start,
+                            hh_end=cli.location.happy_hour_end,
+                            pphh=desk.prize_hh,
+                        )
+                        acc.reporter_uuid = cli.uuid
+                        acc.save()
+                        ld.delete()
+                    else:
+                        ld.processed = True
+                        ld.error_msg = 'No existing accountings found. Stopp processing! {}, {}'.format(ld.client_id, ld.desk_no)
+                        ld.save()
+                        log.error(ld.error_msg)
+        except:
+            log.exception('', exc_info=True)