Similar to the component lists and configuration package creation, when a user selects the shell template components to create an add-on component list, if the selected components have references to the custom user attributes, and the user attribute design is not included, then Unifier displays messages regarding the inclusion of the custom user attributes (including pickers) when you are creating an add-on component list and add-on configuration packages.
Note: If the custom user attributes are shell data pickers, then when you click export Unifier displays error messages while creating add-on component list or add-on configuration package because shell data pickers are dependent on the shell attribute design.
Example
The business process workflow setup filtering conditions has a shell picker as user attribute 'Site Picker 1' in the filtering condition.