How To Fix MW598 - Enter a structured material

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 598

• Message text: Enter a structured material

What causes this issue?

A structured material can be entered for this selection.

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?

Do one of the following:
Enter a structured material
Remove your entry from the field
Change the selection

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 MW598 - Enter a structured material ?

  The SAP error message MW598, which states "Enter a structured material," typically occurs when you are trying to perform an operation that requires a structured material but the system does not recognize the material as such. Structured materials in SAP are materials that have a hierarchical structure, often used in industries like manufacturing and construction, where a product is made up of multiple components.
  Cause:
  
  Material Type: The material you are trying to use may not be defined as a structured material in the system.
  Missing Configuration: The material may not have been properly configured to be recognized as structured.
  Incorrect Transaction: You might be using a transaction that requires structured materials, but the material you selected is not structured.
  Master Data Issues: There could be issues with the material master data, such as missing or incorrect settings.
  
  Solution:
  
  Check Material Type: Verify that the material you are trying to use is indeed a structured material. You can do this by checking the material master record in transaction MM03.
  Create/Modify Material: If the material is not structured, you may need to create a new structured material or modify the existing one. This can be done in transaction MM01 (Create Material) or MM02 (Change Material).
  Use Correct Transaction: Ensure that you are using the correct transaction code that supports structured materials. If you are unsure, consult your SAP documentation or your SAP administrator.
  Review Configuration: Check the configuration settings for structured materials in the system. This may involve looking at the material type settings in customizing (transaction SPRO).
  Consult Documentation: Refer to SAP documentation or help resources for more detailed guidance on structured materials and their configuration.
  
  Related Information:
  
  Material Master Data: Understanding how material master data is structured and maintained in SAP is crucial. This includes knowing the different views and fields that pertain to structured materials.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01, MM02, MM03, and others that may be used for managing materials.
  SAP Notes: Check SAP Notes for any known issues or updates related to structured materials and the MW598 error message.
  User Roles and Authorizations: Ensure that you have the necessary permissions to create or modify structured materials in the system.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in materials management.