What is the test for reopening a trial to address an arithmetical error?

In essence, the request is to reconsider the consequences of my decision as opposed to the decision itself. In other words, it is to seek an addition to the decision as opposed to a change, reconsideration or revision. Hutchinson J., in Hellinckx v. Large, [1998] B.C.J. No. 3072 (B.C.S.C.) at para. 3, was requested to reopen a trial to address an arithmetical error and to take into account the tax consequences of the order. He held as follows: 3 I have no difficulty in reopening to correct the arithmetical error which has been conceded. Regarding the tax consequences of the order made, this was not argued or considered, and does affect the consequences of the order. I shall exercise my discretion in favour of reopening.