Interesting question. I would say yes, but would be even clearer if you had said within your Works Information that it was a mandatory requirement. If you need the electronic format to be able to determine if float/logic links are correct then I would say yes it would be a reason to reject.
I hear several times Contractors refusing to give the electronic format. I would ask what have they got to hide? It is for the Contractor to prove that their programme is of a standard to accept and if I was them I do what ever it takes to make sure that the programme can be accepted.