How To Fix CKMLGRIR021 - External number assignment not supported for &1 &2 &3

CKMLGRIR021 - Overview

• Message type: E = Error

• Message class: CKMLGRIR - GR/IR Account Maintenance

• Message number: 021

• Message text: External number assignment not supported for &1 &2 &3

What causes this issue?

Account maintenance does not support external number assignment.

System Response

The system determined that the number range &V1& for the fiscal year
&V3& is set for the number range object &V2& with external number
assignment.

How to fix this error?

As long as no number in number range &V1& has been assigned, change the
number range to internal number assignment. Otherwise, create a new
number range with internal number assignment and assign this to the
transaction type 'account maintenance'.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CKMLGRIR021 - External number assignment not supported for &1 &2 &3 ?

  The SAP error message CKMLGRIR021, which states "External number assignment not supported for &1 &2 &3," typically occurs in the context of Material Ledger (ML) and Goods Receipt/Invoice Receipt (GR/IR) accounting. This error indicates that there is an issue with the number assignment for the document being processed, particularly when it comes to external number ranges.
  
  Cause:
  
  External Number Assignment: The error usually arises when the system is trying to use an external number range for a document type that does not support it. In SAP, certain document types are configured to use internal number assignment only.
  
  Configuration Issues: The configuration settings for the document type in question may not allow for external number assignment, or the document type may not be set up correctly in the system.
  Document Type: The specific document type being processed (e.g., invoice, goods receipt) may not be configured to allow external number assignment.
  
  
  Solution:
  
  
  Check Document Type Configuration:
  
  Go to the