I'm an in house dev, and yes I develop live (no other choice), I've been doing this for years. But it seems that since FMS 14 (I'm using FMS 15), I can't really alter the schema of my main database file anymore without having my Filemaker Client hanged for hours when I commit schema change.
Sure there's lot's of server side scripts running, and approx 10 clients, but as I can understand that adding field, or changing field can provoke locking, I don't see any reason that adding a single relationship, which is not used anywhere yet can have such consequences.
Do you guys suffers the same thing lately ? or do you have any idea on why this happens.