How To Fix DLCN002 - An invoice already exists in the system for DEL CON &1 and customer &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DLCN - DELCON : System Messages for DC / Days'Collective Dely Note

• Message number: 002

• Message text: An invoice already exists in the system for DEL CON &1 and customer &2

What causes this issue?

Only one billing document can exist in the system for a combination of
delivery-confirmation customer and reference number.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check the existing billing document in the system.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DLCN002 - An invoice already exists in the system for DEL CON &1 and customer &2 ?

  The SAP error message DLCN002 indicates that there is an attempt to create a delivery or credit note for a delivery condition (DEL CON) that already has an associated invoice in the system for a specific customer. This typically occurs in the context of billing and invoicing processes within SAP.
  Cause:
  
  Duplicate Invoice: The primary cause of this error is that an invoice has already been created for the specified delivery condition and customer combination. SAP prevents the creation of multiple invoices for the same delivery to maintain data integrity.
  Incorrect Data Entry: There may be a mistake in the data entry, such as trying to create an invoice for a delivery that has already been billed.
  System Configuration: There could be configuration settings in the billing module that enforce strict rules on invoice creation.
  
  Solution:
  
  Check Existing Invoices: Verify if an invoice already exists for the specified delivery condition and customer. You can do this by checking the billing documents in the SAP system.
  
  Use transaction codes like VF03 (Display Billing Document) to look up existing invoices.
  
  
  Review Delivery and Billing Data: Ensure that the delivery and billing data are correct. If there is a need to create a new invoice, you may need to reverse or cancel the existing invoice first.
  Consult with Finance Team: If you are unsure about the existing invoices or how to proceed, consult with your finance or accounting team to understand the implications of reversing an invoice.
  System Configuration Review: If this error occurs frequently and seems to be a system issue, it may be necessary to review the configuration settings in the SAP system related to billing and invoicing. This may require assistance from an SAP consultant or your IT department.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  VF01: Create Billing Document
  VF02: Change Billing Document
  VF03: Display Billing Document
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation or user manuals related to billing and invoicing processes for best practices and troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.