I was told that there is a system/way of asking for Aces except one.
For instance, after a suit agreement in spades, if you have a void in Diamonds and wish to know how many aces your partner has except diamonds, instead of 4NT you bid 5 Diamonds and your partner will bid 5 Hearts with no ace (or the ace of Diamonds), 5 Spades with one ace, etc.
Have anyone heard about such an option of asking for Aces except one?