Cause

In the Parts tab of the main function belonging to a planning object and in the tab of the same name of the planning object (Properties <...> dialog), different parts entries and / or numbers of units / quantities were specified.

Solution

1. Locate the main function and associated planning object in the pre-planning navigator using the Synchronize selection function offered by the popup menu in the Message management dialog.
2. Open the Properties <...> dialog of the main function and the associated planning object, and, for both objects, respectively, bring to the front the Parts tab.
3. Compare the entries in the columns Part number and / or Number of units / quantity at the main function and the associated planning object.
4. Standardize the entries for both objects if there is a discrepancy regarding the properties Part number and / or Number of units / quantity, and save the modified data.
5. If required, start a new check run.