NFHS--correctable error definition question

[skt101]

NFHS correctable error deals mainly with free throws. Rule 2-10-1e states: erroneously counting or canceling a score. What does this reference too? What would be an example of this? Would not counting a layup fall under this rule or is that a bookkeeping error?

[ilyazhito]

Usually, this refers to counting a 2 as a 3, or vice versa. This could also mean not counting a shot that was released before the buzzer, but waved off by the officials, or counting a shot released after the buzzer.