Thank you Matt and Emily,
Emily had it with
One thing to watch out for: For whatever fields you are using in the lookup filter or search template, make sure you include these fields from the parent Settings record in your child Settings model. In my case, where I am using Opportunity as the child and Account as the parent record, I have added the Account.Industry field to my Opportunity model since I use it in the search template.But I thought I understood that, but obviously I didn’t. I also got confused by the “Select an SObject for this model” message I was getting later. It seems that something was messed on my PC or the servers, because with no changes, that message went away this morning.
Thanks again
