Hello Spikeyxxx
Thanks for your help and suggestions. The interface was done entirely in 2.8, so I don’t know how the oddities got there, but by clearing some of the junk in my files I got it running properly again. I noticed that when I would try to bake the dynamic action of all the dominos falling after the ball hit, on the next run the ball no longer had rigid body physics and would just pass through the dominos. so I just reversed out the dynamic bake.
I appreciate your time to look at and work on this problem for me!
Hans