Diagnosis
You are trying to copy a subscription agent generator. Your action isaborted, because one of the generators cannot be copied.

Procedure
The system checks, if the copy of a generator will create duplicates.To avoid duplicates for publications without maintainable criteriafields (bulk publications or publications with only one referentialcriteria field) only one generator is allowed. The only exception isthat generators delivered by SAP can be copied, if there exist nofurther generator for this publication.
Use the existing subscription agent generator.