How To Fix FINS_ACDOC_DB007 - External document numbers starting with &1 are internally used by SAP

SAP Error Message - Details

• Message type: E = Error

• Message class: FINS_ACDOC_DB - One Accounting Document - Database Layer

• Message number: 007

• Message text: External document numbers starting with &1 are internally used by SAP

What causes this issue?

External document numbers starting with character &V1& are internally
used by SAP. The reserved characters which are internally used in
Financials can be found in table FINS_BELNR_NR. Currently the following
characters are reserved:
'B' Balance Carry Forward Line items
'C' Migration of Line items
'D' Migration of Balances

System Response

It is not allowed to create documents with external document numbers
starting with character &V1&.

How to fix this error?

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

<DS:TRAN.SNRO>Define</> a different external document number range for
number range object 'RF_BELEG' which is not used in table FINS_BELNR_NR.

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 FINS_ACDOC_DB007 - External document numbers starting with &1 are internally used by SAP ?

  The SAP error message FINS_ACDOC_DB007 indicates that the external document numbers you are trying to use in a financial transaction are reserved for internal use by SAP. This typically occurs when the document number you are attempting to enter starts with a specific prefix that is designated for internal processing, which can lead to conflicts or errors in the system.
  Cause:
  
  Reserved Prefix: The external document number you are trying to use starts with a prefix that is reserved by SAP for internal document processing.
  Configuration Settings: The configuration settings in the SAP system may have defined certain ranges or prefixes for internal use, which can lead to this error if you attempt to use them for external documents.
  
  Solution:
  
  Change the Document Number: Use a different external document number that does not start with the reserved prefix. Check the documentation or configuration to identify which prefixes are reserved.
  Review Configuration: If you have access to the configuration settings, review the settings for external document number ranges to ensure that you are not using a reserved prefix. This can typically be found in the Financial Accounting (FI) module under document number ranges.
  Consult with SAP Basis or Functional Consultant: If you are unsure about which prefixes are reserved or how to change the document number, consult with your SAP Basis or functional consultant. They can provide guidance on the configuration and help you identify valid document numbers.
  
  Related Information:
  
  Document Number Ranges: In SAP, document number ranges can be configured for various types of documents (e.g., invoices, payments). It's important to ensure that the external document numbers you use fall within the allowed ranges.
  SAP Notes: Check for any relevant SAP Notes that may provide additional information or updates regarding this error message. SAP Notes can often provide insights into known issues and recommended solutions.
  Transaction Codes: You may need to use transaction codes such as OBAR (for document number ranges) or OBA7 (for external number ranges) to review and adjust the settings related to document numbers.
  
  By following these steps, you should be able to resolve the error and successfully process your financial transactions in SAP.