How To Fix GC860 - No external document number is allowed with internal number assignment

SAP Error Message - Details

• Message type: E = Error

• Message class: GC - Error Messages for Consolidation/Extended General Ledger

• Message number: 860

• Message text: No external document number is allowed with internal number assignment

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message GC860 - No external document number is allowed with internal number assignment ?

  The SAP error message GC860 "No external document number is allowed with internal number assignment" typically occurs when there is a mismatch between the document number assignment settings in your SAP system. This error is often encountered in the context of financial documents, such as invoices or journal entries, where the system is configured to use internal number assignment but an external document number is being provided.
  Cause:
  
  Number Assignment Configuration: The document type you are using is configured for internal number assignment, meaning that the system generates the document number automatically. If you attempt to enter an external document number (one that you manually specify), the system will throw this error.
  Document Type Settings: The specific document type you are working with may have been set up to only allow internal number assignment.
  User Input Error: Users may inadvertently enter an external document number when the system is set to generate numbers internally.
  
  Solution:
  
  
  Check Document Type Configuration:
  
  Go to the configuration settings for the document type in question (e.g., via transaction code OBA7 for financial documents).
  Verify that the number assignment is set to "Internal" for the relevant document type.
  
  
  
  Remove External Document Number:
  
  If you are entering a document manually, ensure that you do not input an external document number. Leave the document number field blank or allow the system to generate it automatically.
  
  
  
  Change Document Type (if necessary):
  
  If you need to use external document numbers, consider changing the document type settings to allow for external number assignment. This may involve adjusting the configuration in the relevant customizing settings.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or consult with your SAP administrator to understand the implications of changing number assignment settings, as it may affect other processes.
  
  
  
  User Training:
  
  Ensure that users are trained on the correct procedures for entering documents in the system to avoid this error in the future.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like OBA7 (for document type configuration) or FB01 (for posting documents) to troubleshoot and resolve the issue.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates related to this error message.
  Support: If the issue persists after checking the configuration and user input, consider reaching out to SAP support or your internal IT team for further assistance.
  
  By following these steps, you should be able to resolve the GC860 error and ensure that your document processing in SAP runs smoothly.