diff --git a/trytond/ir/ui/view.py b/trytond/ir/ui/view.py
index cddc2807b9..a9f47459a4 100644
--- a/trytond/ir/ui/view.py
+++ b/trytond/ir/ui/view.py
@@ -265,8 +265,9 @@ class View(ModelSQL, ModelView):
     def inherit_apply(cls, tree, inherit):
         root_inherit = inherit.getroottree().getroot()
         for element in root_inherit:
-            targets = tree.xpath(element.get('expr'))
-            assert targets
+            expr = element.get('expr')
+            targets = tree.xpath(expr)
+            assert targets, "No elements found for expression %r" % expr
             for target in targets:
                 position = element.get('position', 'inside')
                 new_tree = getattr(cls, '_inherit_apply_%s' % position)(