Diagnosis
You have tried to group together several document items of a document.This is not possible due to one of the following reasons:

• Document items that you want to group together already belong to a
group.

• Method CHECK_EF_GROUP is called with the active BAdI FM_EF_GROUP. In
this method you can define any conditions under which document items canbe grouped. You can use your own messages from your own message classesfor this. The checks that are delivered in the sample implementation ofthe BAdI are explained in the relevant method documentation.

System Response
The system does not carry out the grouping.

Procedure
Check your groupings.
If you want to change the grouping, you must dissolve the groups thatalready exist first using Remove Grouping.