When altering a convoy with obsolete vehicles, autoreplacing doesn't find a suitable depot, even with allow_buying_obsolete_vehicles=1.
Do you mean that the convoy that is being replaced has obsolete vehicles, or that the vehicles with which it is to be replaced are obsolete?
The convoy that is to be replaced has obsolete vehicles and those are not being altered.
Now it seems to happen to any autoreplacing attempt.
Can you elaborate; is the convoy replacer failing to find any depots on any occasion?
As you just put it.
Thank you for the report: I think that I have found and fixed this. Would you be able to re-test?