A customer maintenance form in Uniface 10, part 2 - the four things that turn CRUD into a business application

In [part 1] the customer form does the full CRUD cycle: search, select, edit, save, delete. It compiles, it runs, it looks fine in a demo. Then you hand it to someone who actually works with it, and within ten minutes you get four bug reports: "I created a customer and it overwrote another one." "I typed a phone number, clicked the next row, and my change was gone. No warning." "Searching for meier finds nothing, but Meier does. And I can't search by e-mail." "We now have the same customer three times." None of these are Uniface problems.