We have a OC details page (either for creation or update). There are a bunch of required fields, for some of them we need either item_1 or item_2 is not null. Then on the Save process, i can use PL/SQL expression to list the requirements as Condition when the Create button is pressed. The problem is the process will evaluate the sql expression and won't save the input as expected, but it doesn't display the error message. And a bunch of rest transactions will depend on this inline error display. Wonder if this is the right place for the error message: Thanks.