In my last changes to settings and Output (!71 ), I moved Outputs declaration from `save_objects` to `App.__init__` . Here I accidentally remove one if condition, and now we're declaring an Output object for each output parameter, even if it's not an image. ```py for key in self._out_param_types: self.outputs[key] = Output(self, key, self._settings.get(key)) ``` @remicress what do you think ? Should we allow non image `Output` objects. What about vector data, if we have an app middle pipeline with this kind of output, that we need to flush after app init ? Or when playing with the `frozen` attr ? Are we able to use something like"out.geom" or `app["out.vector"].write("layer.shp")`, if not there is probably no reason to keep this kind of Outputs. And it's the same problem than App without outputs inheriting from OTBObject image functions.