How To Fix CI_DRAFTPRD_MESSAGE128 - With this product type, ext. product no. must not contain only numbers

SAP Error Message - Details

• Message type: E = Error

• Message class: CI_DRAFTPRD_MESSAGE -

• Message number: 128

• Message text: With this product type, ext. product no. must not contain only numbers

What causes this issue?

You have entered a product number that consists only of numbers.

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

However, the product type that you have chosen has been set up in
customizing in such a way that external numbers are assigned without
being checked. A purely numerical product number is not allowed for this
product type.

System Response

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 CI_DRAFTPRD_MESSAGE128 - With this product type, ext. product no. must not contain only numbers ?

  The SAP error message CI_DRAFTPRD_MESSAGE128 indicates that there is an issue with the external product number (external product ID) for a specific product type. The error specifically states that the external product number must not consist solely of numeric characters. This is a validation rule in SAP to ensure that external product numbers have a certain format, which may include alphanumeric characters.
  Cause:
  
  Input Format: The external product number you are trying to enter consists only of digits (e.g., "123456").
  Product Type Restrictions: Certain product types in SAP may have specific requirements for the format of the external product number, which may include the need for letters or special characters.
  Configuration Settings: The system may have been configured to enforce this rule for specific product types.
  
  Solution:
  
  Modify the External Product Number: Change the external product number to include at least one alphabetic character or special character. For example, instead of "123456", you could use "ABC123" or "123-456".
  Check Product Type Requirements: Review the documentation or configuration settings for the specific product type you are working with to understand the expected format for external product numbers.
  Consult with SAP Support or Configuration Team: If you believe that the requirement is incorrect or needs to be adjusted, consult with your SAP support team or the configuration team to see if the validation rules can be modified.
  
  Related Information:
  
  SAP Documentation: Refer to the SAP Help Portal or specific module documentation for guidelines on product master data and external product number formats.
  Transaction Codes: You may need to use transaction codes like MM01 (Create Material) or MM02 (Change Material) to enter or modify product data.
  Data Validation: Ensure that any data entry processes or interfaces that populate external product numbers adhere to the required format to prevent this error from occurring in the future.
  
  By following these steps, you should be able to resolve the error and successfully enter the external product number in SAP.