Hundreds of New Zealand visa applicants were accidentally approved for visas following a computer error last week. The Silver Fern Visa scheme is limited to 300 visas annually, but a computer glitch at Immigration New Zealand incorrectly accepted a further 330 visa applications after the quota had been filled."A technical fault occurred shortly after the Silver Fern opened which enabled people to submit applications after all the places had been filled," said Rob Stevens, Immigration New Zealand's service support general manager.