diff --git a/apps/abs/models.py b/apps/abs/models.py
index b415531..77da5dd 100644
--- a/apps/abs/models.py
+++ b/apps/abs/models.py
@@ -655,7 +655,7 @@ class ABSConfiguration(Configuration):
         print ('Send beam')
         print (self.active_beam)
         beams = ABSBeam.objects.filter(abs_conf=self)
-        #print beams[self.active_beam-1].module_6bits(0)
+
         active = ABSActive.objects.get(pk=1)
         if active.conf != self:
             self.message = 'La configuracion actual es la del siguiente enlace %s.' % active.conf.get_absolute_url()
diff --git a/apps/abs/views.py b/apps/abs/views.py
index 0bfa845..be7cfe0 100644
--- a/apps/abs/views.py
+++ b/apps/abs/views.py
@@ -249,9 +249,12 @@ def import_file(request, id_conf):
 def start(request, id_conf, id_beam):
 
     conf = get_object_or_404(ABSConfiguration, pk=id_conf)
-    conf.start_device(id_beam)
     beams_list = ABSBeam.objects.filter(abs_conf=conf)
-    for beam, i in enumerate(beams_list):
+    if id_beam>=len(beams_list):
+        return HttpResponse(json.dumps({'result':0}), content_type='application/json')    
+    conf.start_device(id_beam)
+    
+    for i, beam in enumerate(beams_list):
         if i==int(id_beam):
             conf.active_beam = beam.pk
             break