[OSM-newbies] JOSM error: 412 Precondition Failed

[Andy Allan]

On 7/31/07, Dirk-Lüder Kreie <osm-list at deelkar.net> wrote:
> Þórir Már Jónsson schrieb:

>  > Do I really have to delete the lot and start over?
>
> Deleting the affected objects means you should look exactly where it
> fails (JAVA console) and look in JOSM with the search tool for the id
> (Search for "id:12341234").

Also, don't forget to hit "download" just before you upload. It should
then warn you about any conflicts (i.e. things that have changed on
the server since you originally downloaded) and let you fix them
before uploading.

Cheers,
Andy