How To Fix 26015 - Only external or mixed number assignment supported for document type &

SAP Error Message - Details

• Message type: E = Error

• Message class: 26 - Dokumentenverwaltung

• Message number: 015

• Message text: Only external or mixed number assignment supported for document type &

What causes this issue?

You want to create a document of document type &V1& and want the system
to assign the document number <ZH>internally</>.
Via settings in the IMG (Document management), it is defined that
document number assignment for document type &V1& can only be
<ZH>external</> or <ZH>mixed</>.

How to fix this error?

Enter a document number, or the external part of a mixed document
number.
If your entry is purely numeric, you need to use the number ranges that
are defined in the IMG (Document management -> Control data -> Define
number ranges).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 26015 - Only external or mixed number assignment supported for document type & ?

  The SAP error message 26015, which states "Only external or mixed number assignment supported for document type &," typically occurs in the context of document number assignment in SAP, particularly when dealing with financial documents or other transactional documents.
  Cause:
  This error arises when the system is configured to use a specific type of number assignment for a document type that does not support the current configuration. The document type in question may be set to use internal number assignment, while the system is trying to process it with external or mixed number assignment. 
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Document Type Configuration:
  
  Go to the configuration settings for the document type in question. This can usually be found in the SAP Customizing Implementation Guide (IMG) under:
  
  Financial Accounting (FI) > Financial Accounting Global Settings > Document > Document Number Ranges > Define Document Number Ranges.
  
  
  Verify the number assignment settings for the document type. Ensure that it is set to either "External" or "Mixed" if you intend to use those types.
  
  
  
  Adjust Number Assignment:
  
  If the document type is set to "Internal," and you want to use external or mixed number assignment, change the setting accordingly.
  If you need to keep it as "Internal," ensure that the documents being processed are using the correct internal number assignment.
  
  
  
  Check User Input:
  
  Ensure that the user is entering the document numbers correctly. If the system is expecting an external number and the user is trying to enter an internal number (or vice versa), this can trigger the error.
  
  
  
  Review User Authorizations:
  
  Sometimes, user authorizations can affect the ability to create or process documents. Ensure that the user has the necessary permissions to use the document type in question.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for additional context on the specific document type and its configuration.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like OBY6 (for document types) or OBA7 (for number ranges) to access the relevant configuration settings.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  Testing: After making changes, perform tests to ensure that the error no longer occurs and that documents can be processed as expected.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or functional team for further investigation.