the message means that the Input parameter "Note" has not been provided to the "User Input" Entry Unit. In case a field (e.g. the "Note" field) has the "Preloaded" property set, you have to specify the value to preload, for example in the coupling dialog of the link incoming to the Entry Unit, or with the slots added to the field.
In this case, the "Next Activity Note" property of the task (e.g. the Edit Report task of the Expense Report sample project) indicates the activity can be commented with a note. If you wish that the user specifies a note on the activity, at execution time, you can for example:
- uncheck the "Preloaded" property of the "Note" field
- add the "User Input" Entry Unit in the Layout Grid of the page
This is the result:
1) The employee adds a note
2) The supervisor reads the note