You can check whether all of your definitions for the application model are valid. Your model is invalid, for example, if a name you specified contains special characters that are not allowed or if a required property has not yet been defined.

If one or more errors are detected, the number of errors is indicated in a message at the top of the Outline Editor, for example, "9 errors detected". When you move the mouse pointer over this message, a tooltip appears informing you what you must do to fix the errors.

Mobile Development automatically validates an application model when you save your changes to it. When entering a name, its characters are checked while you enter them. However, you can also validate the application model manually at any time.