[OSM-talk] Relation 412 errors

[Ben Laenen]

Hi all,

I keep having 412 errors when trying to modify a certain route relation 
(id=3964, runs from Antwerp to the Netherlands in Belgium). It's quite 
a long route relation so I don't immediately see where the problem is, 
just the 412 error on the terminal (which JOSM doesn't detect btw, it 
thinks it uploaded successfully).

Point is, since I can't modify the relation, I can't modify a highway 
intersection where this route relation passes (because one can't delete 
ways belonging to a relation, which also gives a 412 error when you try 
to do that), and now have this quite broken intersection as a result.

Therefore this question: is there some way to get more info from the 
server about the specific nature of this problem?

Some weeks ago, I had a similar issue btw, I was trying to add a way to 
a relation which would always give a 412 error from the server. In the 
end I deleted that way and replaced it with a new way and added that 
one, which worked (still no idea what was wrong with that way though, 
it looked good), but then I at least knew what specific way gave this 
problem, I can't possible check each specific way in a route which runs 
for 100km.

Greetings
Ben

PS: is there any work being done into finally properly supporting route 
relations in the editors? It still randomly happens now and then that 
routes get broken because an editor lets a user split or join roads 
with relations on them.