If the opposing side dumps new information on you right before trial (as frequently happens), it is your responsibility to make a motion that you be allowed additional time to review it.
If you made such a motion and the judge denied it, then that becomes the basis of an appeal in that the judge erred by not allowing the extra time. On the other hand, if you never made such an argument and then try to introduce new evidence in a post-trial motion or appeal, you will not be very successful.
If you made such a motion and the judge denied it, then that becomes the basis of an appeal in that the judge erred by not allowing the extra time. On the other hand, if you never made such an argument and then try to introduce new evidence in a post-trial motion or appeal, you will not be very successful.