diff --git a/django_project/cplus_api/api_views/layer.py b/django_project/cplus_api/api_views/layer.py
index df6e5cb..6c1cae7 100644
--- a/django_project/cplus_api/api_views/layer.py
+++ b/django_project/cplus_api/api_views/layer.py
@@ -813,12 +813,13 @@ def get(self, request, *args, **kwargs):
         try:
             reference_layer = get_object_or_404(
                 InputLayer,
-                component_type=InputLayer.ComponentTypes.REFERENCE_LAYER
+                component_type=InputLayer.ComponentTypes.REFERENCE_LAYER,
+                file__isnull=False
             )
         except MultipleObjectsReturned:
             reference_layer = InputLayer.objects.filter(
                 component_type=InputLayer.ComponentTypes.REFERENCE_LAYER
-            ).first()
+            ).last()
         if reference_layer.is_available():
             basename = os.path.basename(reference_layer.file.name)
             file_path = os.path.join(