How To Fix WU420 - Please enter a material

WU420 - Overview

• Message type: E = Error

• Message class: WU - Promotion management messages

• Message number: 420

• Message text: Please enter a material

What causes this issue?

You entered a unit of measure but no material number.
&what_to_do&
Enter a material number or delete the unit of measure.

Error message extract from SAP system. Copyright SAP SE.

WU420 - Details

• The SAP error message WU420 ("Please enter a material") typically occurs in the context of material management or inventory management processes. This error indicates that the system requires a material number to proceed with a transaction, but none has been provided.
  
  Cause:
  
  Missing Material Number: The most common cause is that the user has not entered a material number in the relevant field.
  Incorrect Screen Navigation: The user may have navigated to a screen that requires a material number without first selecting or entering one.
  
  Configuration Issues: There may be configuration settings in the SAP system that require a material number for certain transactions, and these settings may not be properly aligned with user expectations.
  User Authorization: In some cases, the user may not have the necessary authorizations to view or select materials.
  
  
  Solution:
  
  Enter a Material Number: Ensure that you enter a valid material number in the required field. You can use the search function (often