Restrictions of Migration with Document Splitting 

Use

In the case of migration with document splitting, the open items have to be supplemented with account assignments that are relevant for document splitting in cases where these account assignments are not already part of the open item. If an open item relates to multiple values of a specific account assignment, then no document splitting is applied when the open item is migrated (as is the case with documents in phase 1 of the migration).

Reversal documents that are posted in phase 1 are not validated because the reversal has to be made using the account assignments of the document to be reversed. This is of particular significance if you reverse in phase 1 documents from phase 0. Such reversals would not be validated in the same way as normal postings or inverse postings.