How To Fix WU777 - Material &: Quantity change not possible for generic materials

SAP Error Message - Details

• Message type: E = Error

• Message class: WU - Promotion management messages

• Message number: 777

• Message text: Material &: Quantity change not possible for generic materials

What causes this issue?

You changed the planned sales quantity, the minimum order quantity or
the allocation quantity of a generic material.

System Response

You can only make these changes for the variants of a generic material.
The system then sets the sum of all variant quantities for the generic
material.

How to fix this error?

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

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 WU777 - Material &: Quantity change not possible for generic materials ?

  The SAP error message WU777, which states "Material &: Quantity change not possible for generic materials," typically occurs when you are trying to change the quantity of a generic material in a transaction where such changes are not allowed. Generic materials in SAP are often used in scenarios like variant configuration or when dealing with materials that have multiple variants but are treated as a single entity in certain transactions.
  Cause:
  
  Generic Material Type: The material you are trying to modify is defined as a generic material, which means it does not have a specific quantity associated with it in the same way that a standard material does.
  Transaction Restrictions: Certain transactions in SAP do not allow changes to the quantity of generic materials due to the way they are structured in the system.
  Configuration Settings: The system may be configured to prevent changes to quantities for generic materials to maintain data integrity.
  
  Solution:
  
  Use Specific Material: If you need to change the quantity, consider using a specific material instead of a generic one. This may involve creating a specific variant of the generic material.
  Check Transaction Type: Ensure that you are using the correct transaction for the operation you are trying to perform. Some transactions may not support quantity changes for generic materials.
  Consult Documentation: Review SAP documentation or help files related to generic materials and the specific transaction you are using to understand the limitations and requirements.
  Contact SAP Support: If you believe that the error is occurring inappropriately or if you need further assistance, consider reaching out to SAP support or your internal SAP helpdesk for guidance.
  
  Related Information:
  
  Generic Materials: These are materials that do not have a specific configuration and are often used in scenarios where multiple variants exist.
  Material Master Data: Understanding how generic materials are set up in the material master can help in troubleshooting this error.
  SAP Notes: Check for any relevant SAP Notes that may address this error or provide additional context on handling generic materials.
  User Roles and Permissions: Ensure that your user role has the necessary permissions to perform the actions you are attempting.
  
  By following these steps, you should be able to address the WU777 error and understand the limitations associated with generic materials in SAP.