id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
7142	Precondition failed cryptic error	planemad	team	"I got the following error while uploading the last few objects out of a 3000 object changeset while doing some offline mapping in a remote part of India. I have no idea what it means or what can be done.

{{{
Uploading to server failed because your dataset violates a precondition.
ResponseCode=412, Error Header=<Precondition failed: Way requires the node with id in (XXXX,XXXX...) which either does not exist or are not visible.>
}}}

There must atleast be an option to exclude the affected objects from the changeset so that it can be resolved at a ater time or just dropped off completely if it is trivial. I have had such precondition failed messages before and I resolve it with great difficulty by manually editing out such objects from the .osm file by searching for them with specified id#. And because i cannot copy past text from the error dialog box, the task is extremely tedious and frustrating.

I can just imagine the frustration of someone new who has done a lot of mapping and suddenly faced with this error with no further information on how it can be resolved."	defect	closed	major		Core	latest	duplicate	precondition failed changeset conflict