In JOSM’s Changeset Management Dialogue, clicking on the buttons to select or zoom in to objects returns a message “The selected object is not available in the current edit layer”, and opening a changeset downloaded from openstreetmap.org in JOSM results in “no data found”. Is there an option somewhere to download the content of a changeset to an edit layer and not just to the dialogue?
Check this url
i am not sure but hope this will be useful for you.
Maybe it would be useful if you explain what you want to do (not just this single step). That sounds like there is an other way than the one you tried to do it.