How To Fix W_CB411 - No external number assigned (number range &1 &2 is external)

W_CB411 - Overview

• Message type: E = Error

• Message class: W_CB -

• Message number: 411

• Message text: No external number assigned (number range &1 &2 is external)

What causes this issue?

External number assignment is active for this number range. In this case
<(>,<)> you implement the method EXTERNAL_NUMBER_ASSIGNMENT in BAdI
<DS:SIMG.WCB_NUMBER_CHANGE>WCB_NUMBER_CHANGE</> to determine the
external number. This BAdI has been implemented, but the method does not
return a number.

System Response

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

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

W_CB411 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  W_CB411 No external number assigned (number range &1 &2 is external)
  
  
  Cause:
  This warning message occurs when you try to create or post a document or master data object that requires a number assignment, but the number range interval assigned to the object is set to external number assignment, and no number has been manually entered.
  
  Number range interval is set to external: This means the system expects the user to provide the number manually.
  No number entered: The user did not enter a number, so the system cannot assign one automatically.
  The system cannot generate a number automatically because the number range interval is defined as external (manual input required).
  
  
  Explanation:
  In SAP, number ranges can be defined as:
  
  Internal number assignment: The system automatically assigns the next available number from the number range.
  External number assignment: The user must manually enter the number; the system does