Callback for when attempting to create a room but room already exists?

I read some suggestions to get the entire list of rooms to check if the desired room name already exists, but I don't want the user to have to download the entire list of rooms.

Is there a callback for when attempting to create a room and it already exists?

public override void OnPhotonJoinRoomFailed(object[] codeAndMsg) does not seem to trigger when a room already exists.

Thanks!