A news release from the university says 504 people were notified that they had been accepted to the Bachelor of Science nursing program.
But there are only 103 spaces available in the program, so 401 people were sent retraction emails.
The university is conducting an investigation into what led to the technical error.
Donna Murnaghan, the nursing school's dean, says the department understands how disappointed prospective students and their families may be, and apologizes for the mistake.
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