Diagnosis
You edited assignment &V2& and assignment &V4& of the allocationstructure &V1& in controlling area &V3&. The cost element groups orintervals entered as sources in assignments &V2& and &V4& overlap
. When a cost type is allocated to more than one allocationassignment, the allocation structure is ambiguous.

System Response
You can still edit and save the allocation structure regardless of thesystem messages. However, the intervals that overlap are liable toeither be ignored or cause errors during settlement.

Procedure
Get rid of the overlap in the "source" screen by navigating in anassignment and entering other cost element intervals or cost elementgroups, or changing cost element intervals/groups that already exist.
In the "source" screen of an assignment you can display the intervalsof a cost element group by double-clicking on it. You can change theinterval assignment of the group via Extras > Cost element group >Change.
In the "source" screen of an assignment you can display your allocationstructure including cost element intervals/cost element groups bychoosing Extras > Overview list
.