Message type: E = Error
Message class:  FICUSTOM - Customizable Messages for Funds Management 
Message number: 037
Message text: Posting residual items without invoice reference not possible
The payment matching functions between Financial Accounting and Funds
Management are activated in the customizing of <LS>Funds Management</>.
To ensure data consistency, you may not use any residual items without
an invoice reference in this scenario.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FICUSTOM037 indicates that the system is unable to post residual items without an invoice reference. This typically occurs in the context of financial accounting, particularly when dealing with residual items in accounts payable or receivable.
Cause: The error is usually triggered by one of the following reasons: Missing Invoice Reference: The system requires an invoice reference for posting residual items. If the invoice reference is not provided, the posting cannot be completed. Configuration Settings: The configuration settings in the SAP system may not allow for posting residual items without an invoice reference. This could be due to specific business rules or settings in the financial accounting module. Document Type Restrictions: Certain document types may have restrictions that prevent posting without an invoice reference.
Solution: To resolve the error, you can take the following steps: Check Invoice Reference: Ensure that the invoice reference is correctly entered in the transaction. If you are trying to post
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