Long queues formed at the doors as past pupils from 40 and 50 years ago met and exchanged memories, with many reliving their first days in the school.
The May 15 get-together was a highpoint in the year-long celebration of Killicomaine's opening back in 1958 and the turn-out of past pupils and teachers provided proof of the regard in which they continue to hold the school.
After the receptions and a brief introduction by current head, Mr Hugh McCarthy, Mr David Riley - principal from 1958 until 1995 - entertained his audience with a series of anecdotes.
Those present were then treated to a programme of music from the 1960s performed by the current school choir, folllwed by a superb display of Irish dancing.
Then, left free to view the photographic displays and peruse the memorabilia which included the newly published 'History of Killicomaine', many took the opportunity to tour the school and re-visit their old classrooms.
Staff past and present mingled with their former pupils, those teachers including such notables as Mr Sammy Kearns, Miss Daisy Pillow, Miss Pat Stacey, Mrs Stella Riley and Mr David Elliott whose names are woven deep into the fabric of Killicomaine's history having been there in '58 when the school opened.
Mr David Arkley (1972-1996) called the evening "fascinating" while Mrs Doreen Doogan (1963-1974) said it had been "wonderful to renew old acquaintances and exchange anecdotes" with pupils she had once taught.
A number of former pupils took the school up on the offer to send them photocopies of their reports, whilst many more had their photographs taken with old classmates and teachers. These can now be seen at, www.killicomaine.co.uk.
Two past pupils who were present on the school's first day, Messrs Archie McCann and David McConnell formed the organising team and were part of the reception committee.
Afterwards Archie said, "It has been a great occasion. It has been lovely to meet up with so many people from the days when we were all at school and had it all ahead of us.
"I think we've all enjoyed seeing round the school once again. A lot of it is different, of course, but some things really haven't changed very much at all so it was a stroll down memory lane for us."
Golden anniversary ties, calendars and CDs sold briskly, as did the DVD, 'Time After Time', a musical trip through the decades.