How To Fix W_CB410 - External number assignment not implemented (number range &1 &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: W_CB -

• Message number: 410

• Message text: External number assignment not implemented (number range &1 &2)

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.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message W_CB410 - External number assignment not implemented (number range &1 &2) ?

  SAP Error Message:
  
  W_CB410 External number assignment not implemented (number range &1 &2)
  
  Meaning / Cause:
  This warning message occurs in SAP when an external number assignment is attempted for a document or object, but the system does not find an implementation or configuration for the specified number range interval.
  
  External number assignment means the user or an external system provides the document number instead of the system automatically assigning it.
  The system checks the number range intervals defined for the object.
  If the number range interval specified (&1) and the number range object (&2) do not support external number assignment, or if the number range interval is not properly configured, this warning is triggered.
  
  
  Typical Scenario:
  
  You try to create a document (e.g., FI document, MM document, or any other business object) and enter a document number manually.
  The number range interval for that document type or object is set to internal assignment only.
  The system expects to assign numbers automatically but finds an external number provided.
  Since external number assignment is not implemented for that number range interval, the system issues this warning.
  
  
  Solution / How to Fix:
  
  
  Check Number Range Interval Settings:
  
  Go to transaction SNRO or SNUM (depending on the object).
  Enter the number range object (&2 from the message).
  Display the number range intervals.
  Check the interval (&1 from the message).
  Verify if the interval allows external number assignment.
  
  There is usually a flag or setting indicating whether external number assignment is allowed.
  
  
  
  
  
  Adjust Number Range Interval:
  
  If external number assignment is required, change the number range interval to allow external number assignment.
  If external number assignment is not intended, inform users not to enter numbers manually and let the system assign numbers automatically.
  
  
  
  Check Customizing for the Object:
  
  Sometimes, the number range object is linked to a business object or document type.
  Verify the customizing settings in the IMG (Implementation Guide) for the relevant module.
  Ensure that the number range intervals are correctly assigned and configured.
  
  
  
  User Training / Process Adjustment:
  
  If external number assignment is not supported, train users to avoid manual number entry.
  Use the system-assigned numbers to prevent this warning.
  
  
  
  
  Additional Information:
  
  Message Class: W_CB410  
  Message Type: Warning (W) — the process may continue but the number assignment might not behave as expected.
  Common Modules: FI (Financial Accounting), MM (Materials Management), SD (Sales and Distribution), or any module using number ranges.
  Transaction Codes: SNRO (Number Range Objects), SNUM (Number Range Maintenance), or module-specific number range customizing.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  External number assignment attempted for a number range interval that does not support it.
  
  
  Effect
  Warning message; number assignment may fail or behave unexpectedly.
  
  
  Solution
  Adjust number range interval to allow external assignment or avoid manual number entry.
  
  
  Tools to Use
  SNRO, SNUM, IMG customizing for number ranges.
  
  
  Preventive Action
  Proper configuration and user training on number assignment procedures.
  
  
  
  
  If you provide the exact number range object and interval from the message, I can help you with more specific steps.