In some embodiments, a robotic process automation (RPA) robot is configured to identify a runtime target of an automation activity (e.g., a button to click, a form field to fill in, etc.) by searching a user interface for a UI element matching a set of characteristics of the target defined at design-time. When the target identification fails, some embodiments display an error message indicating which target characteristic could not be matched. Some embodiments further display for selection by the user a set of alternative target elements of the runtime interface.