THE Leaving Cert Irish exam went ahead today with replacement papers after a major security blunder.
The State Examinations Commission (SEC) assured students the exam would go ahead on schedule at 2pm today.
Schools across the country collected the substitute assessments from local An Post delivery offices this morning.
The aural test for today's exam was sent in error to a number of Junior Cert students.
It forced the SEC to issue a replacement Paper One and CD.
The Leaving Cert CD had been sent to a small number of special needs Junior Cert students last Thursday.
More than 40,000 students were taking the Irish higher and ordinary-level papers and aural tests today.
The aural is worth 10pc of the final grade, with the written papers accounting for 50pc.
The oral test taken last April is worth the remaining 40pc.
Responding to the security breach, Education Minister Ruairi Quinn said the integrity of the examinations system ha d been maintained.
"The contingency arrangements being put in place were devised by the commission to deal with occurrences such as this," he said.
"I am satisfied the SEC is taking every step necessary to ensure the integrity of the examination system is maintained," he said.