diff -r cc988ec8da34 trytond/trytond/protocols/dispatcher.py
 --- a/trytond/trytond/protocols/dispatcher.py   Mon Apr 23 17:12:37 2018 +0200
 +++ b/trytond/trytond/protocols/dispatcher.py   Fri May 11 12:53:17 2018 +0200
 @@ -122,8 +122,19 @@
      type, _ = method.split('.', 1)
      name = '.'.join(method.split('.')[1:-1])
      method = method.split('.')[-1]
 -    return pool.get(name, type=type), method
 -
 +    try:
 +        obj = pool.get(name, type=type)
 +    except KeyError:
 +        if name[:15] == 'babi_execution_':
 +            with Transaction().start(pool.database_name, request.user_id,
 +                    readonly=False):
 +                Execution = pool.get('babi.report.execution')
 +                execution = Execution(int(name[15:]))
 +                execution.validate_model()
 +            obj = pool.get(name, type=type)
 +        else:
 +            raise
 +    return obj, method

  @app.auth_required
  @with_pool