https://community.appian.com/discussions/f/new-to-appian/31258/interfaces-102-appian-developer-courseInterface Definition: Expression evaluation error [evaluation ID = 0K0QK] : An error occurred while executing a save: Expression evaluation error: AA Maintenance must be indexed by its corresponding record type fields or relationships Everythingen-USTelligent Community 12https://community.appian.com/thread/125100?ContentTypeID=1Fri, 26 Jan 2024 18:13:37 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:a93ce54c-9fad-45b4-9dc1-b0f8303a01d8Stefan Helzle<p>Difficult to say, as it seems there is some code missing. In general, you have to reference fields in a record using the record syntax, but not dot-notation.</p> <p><a href="https://docs.appian.com/suite/help/23.4/reference-records.html#reference-record-values-in-the-record-type">https://docs.appian.com/suite/help/23.4/reference-records.html#reference-record-values-in-the-record-type</a></p><div style="clear:both;"></div>https://community.appian.com/thread/125098?ContentTypeID=1Fri, 26 Jan 2024 17:37:41 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:e49de1cd-5ed4-40e1-aaa1-5309909bebf9Silas. B. Ferreira<p>I would appreciate very much if some of you gives me the solution. Thanks in advance</p><div style="clear:both;"></div>