Unable to aggregate - no fields selected

May occur with part lists or with product requirements

If the Requirements parameter 'Aggregate duplicate parts' is set or the option at the part list 'Edit - Combine duplicates' is selected the program collects all parts of the same size and material (duplicate parts) into a single record for optimising.

This message typically indicates that no fields are set to define duplicate parts

- Check the parameter settings for the relevant program to ensure fields are set