Okay so I have done all of these things. I also have gone back in and found post 441-451 in this thread about my last attempt at the upgrade. I have the same results!

Log says
[28-Mar-2014 14:24:44] PHP Fatal error: Call to undefined function getrewardpoints() in /home4/w57dsjmm/public_html/order/includes/modules/order_total/ot_reward_points_display.php on line 40

however line 40 of said file is $reward_points=GetRewardPoints($order->products);

I feel as if this is ground hog day all over again!