Diagnosis
You started the update of several variants of a generic material blockwith a selected master variant. In the process, no information for thematerial hierarchy was specified at the master variant level, butinformation was specified for at least one other variant.
When the master variant is updated together with other variants thatbelong to the generic material block, the material hierarchy can only beupdated at the variant level if the material hierarchy data is alsomaintained at the master variant level.

System Response
The system detects the situation described above and issues an errormessage.

Procedure
Maintain the hierarchy data for the master variant and start the updateagain.