How To Fix VP864 - External number assignment not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: VP - Vertriebsbelegpartner

• Message number: 864

• Message text: External number assignment not allowed

What causes this issue?

You want to assign an external document number even though an indicator
for external number assignment has not been set for the number range
allocated to this document type.

How to fix this error?

If external number assignment should be allowed for this document type,
you must set an indicator for external number assignment for the number
range allocated. Otherwise you can delete the number of the number
range for external number assignment in the document type so that the
field no longer accepts input for external number assignment in the
document.
INCLUDE 'NA_CUST_MAINTAIN_3' OBJECT DOKU ID TX LANGUAGE E
Set indicator:

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message VP864 - External number assignment not allowed ?

  Certainly! Here's a detailed explanation regarding the SAP error message VP864 - External number assignment not allowed:
  
  SAP Error Message: VP864 - External number assignment not allowed
  
  
  Cause:
  This error occurs when you try to create or assign an external number to an object (such as a sales document, customer number, or material number) in a number range interval that is configured for internal number assignment only.
  In SAP, number ranges can be set up to allow either:
  
  Internal number assignment: SAP automatically assigns the next available number.
  External number assignment: The user manually enters the number.
  
  If the number range interval is set to internal only, and you try to enter a number manually (external assignment), the system throws this error.
  
  Where it commonly occurs:
  
  Sales documents (e.g., sales orders, deliveries)
  Customer master records
  Material master records
  Other master data or transactional documents where number ranges are used
  
  
  
  Solution:
  
  
  Check the number range interval settings:
  
  Go to the relevant number range maintenance transaction (e.g.,