diff -r 0bde16075654 trytond/trytond/pool.py
--- a/trytond/trytond/pool.py   Sun Jul 28 16:05:45 2019 +0200
+++ b/trytond/trytond/pool.py   Fri Aug 16 11:13:08 2019 +0000
@@ -183,6 +183,12 @@
                 cls.__setup__()
                 self.add(cls, type)
                 return cls
+            elif name[:15] == 'babi_execution_':
+                with Transaction(new=True).start(self.database_name, 0, readonly=False):
+                    Execution = self.get('babi.report.execution')
+                    execution = Execution(int(name[15:]))
+                    execution.validate_model(avoid_registration=True)
+                return self._pool[self.database_name][type][name]
             raise
 
     def add(self, cls, type='model'):