Do you overrule yourself ?

[rainmaker]

It's easy if you realized the problem before you signalled or "called" the violation. Even part way through that process, you can sort of cough roughly, and then indicate a brain fart/inadvertant whistle. Once you've called it, signalled and started going on with the game, it's pretty tough to call it back. Technically, I don't think you can. But in reality, people do. Just don't try it very often.

By the way, don't call it a Correctable Error. It's not, as defined by Rule 2-10. It can be a Fixable Mistake, which means you can "fix" it, even though you'll lose some credibility in the process. Once the ball is live on the subsequent throw-in, it's really too late, though.