How To Fix WB020 - No layout modules have been assigned to the materials

SAP Error Message - Details

• Message type: E = Error

• Message class: WB - Messages for assortment list

• Message number: 020

• Message text: No layout modules have been assigned to the materials

System Response

Placement information from the layout cannot be used for follow-on
processes (such as the assortment list).

How to fix this error?

Assign the materials to layout modules.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WB020 - No layout modules have been assigned to the materials ?

  The SAP error message WB020, which states "No layout modules have been assigned to the materials," typically occurs in the context of the SAP Warehouse Management (WM) module. This error indicates that the system cannot find any layout modules associated with the materials you are trying to work with, which can prevent certain operations from being completed.
  Cause:
  
  Missing Layout Modules: The most common cause of this error is that the materials in question do not have any layout modules assigned to them in the system.
  Incorrect Material Master Data: The material master data may not be properly configured, leading to the absence of layout module assignments.
  Warehouse Configuration Issues: There may be issues with the configuration of the warehouse or storage types that are supposed to be linked to the materials.
  Data Migration Issues: If data was migrated from another system, layout modules may not have been transferred correctly.
  
  Solution:
  To resolve the WB020 error, you can follow these steps:
  
  
  Check Material Master Data:
  
  Go to the material master record (transaction code MM03).
  Check the relevant views (especially the Warehouse Management view) to see if layout modules are assigned.
  
  
  
  Assign Layout Modules:
  
  If layout modules are missing, you can assign them using transaction code WM01 or through the material master record.
  Ensure that the layout modules are correctly defined in the system.
  
  
  
  Review Warehouse Configuration:
  
  Check the configuration of the warehouse and storage types using transaction code SPRO.
  Ensure that the layout modules are correctly linked to the relevant storage types.
  
  
  
  Check for Data Migration Issues:
  
  If the materials were migrated from another system, verify that all necessary data, including layout modules, was transferred correctly.
  You may need to reassign layout modules if they were not included during the migration.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to Warehouse Management for additional guidance on layout modules and their configuration.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Display Material), WM01 (Maintain Layout Modules), and SPRO (Customizing).
  SAP Notes: Check for any SAP Notes related to this error message for specific patches or updates that may address the issue.
  User Roles and Authorizations: Ensure that you have the necessary authorizations to make changes to material master data and warehouse configurations.
  
  By following these steps, you should be able to identify the cause of the WB020 error and implement the necessary solutions to resolve it.