Validation of the Document Splitting Characteristics for General Ledger Accounting 
With this function, you can validate the settings in Customizing for document splitting.
Integration
Validation is a function of document splitting in new General Ledger Accounting.
You validate the Customizing settings for document splitting in the following steps:
Validation of business transaction variants and item categories
When posting, the system first determines from the document type the underlying business transaction and the business transaction variant assigned. The system then assigns the item category to the individual items within the document and checks whether the item categories are permitted for the business transaction variant.
This ensures that the document type and items within a document are correctly assigned in document splitting. However, the system cannot check whether the document type logically matches the business transaction to be updated. Consequently, a document that is, for example, assigned to business transaction Vendor Invoice (0300) should also contain an item with item category Vendor (03000). You need to ensure that your documents match logically (see also the implementation considerations under Document Splitting).
Validation of the Document Splitting Characteristics for General Ledger Accounting
These checks are made after active document splitting has been performed and, where applicable, after the enhancement logic has been applied.
Prerequisites
You have implemented Customizing for document splitting.
Features
For individual document splitting characteristics for General Ledger Accounting, you can define that the line items for these document splitting characteristics must be assigned to an account. To do this, set the Required Entry Field indicator for these document splitting characteristics in Customizing for General Ledger Accounting (New) under 
Business Transactions 
Document Splitting Define Document Splitting Characteristics for General Ledger Accounting 
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If you set this indicator for a document splitting characteristic, the system checks whether the line items for this document splitting characteristic have been assigned to an account. If such an account assignment is missing, the system rejects the posting and issues an error message.
Constraints
The system checks none of the documents from component Contract Accounts Receivable and Payable (FI-CA) and its subsequent processes in Financial Accounting (FI).