How To Fix WGDS_ENH128 - Material group can be changed only after saving the converted variants

SAP Error Message - Details

• Message type: E = Error

• Message class: WGDS_ENH -

• Message number: 128

• Message text: Material group can be changed only after saving the converted variants

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WGDS_ENH128 - Material group can be changed only after saving the converted variants ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WGDS_ENH128: Material group can be changed only after saving the converted variants
  
  Cause:
  This error occurs in the Variant Configuration (LO-VC) context, specifically when working with classification characteristics or material groups in the variant configuration master data or during the conversion of variant characteristics/values.
  
  The system is designed to prevent changes to the Material Group field while there are unsaved or uncommitted changes in the converted variants or characteristics.
  The converted variants refer to the internal data structures or tables that hold the variant characteristics and their values after conversion from classification data.
  If you try to change the material group before saving these converted variants, the system throws this error to maintain data consistency and integrity.
  
  
  When does it typically occur?
  
  During the conversion or update of variant characteristics in the classification system.
  When modifying the material group in the material master or variant configuration master data before saving the changes to the variant characteristics.
  In the transaction for variant configuration or during mass changes of variant characteristics.
  
  
  Solution:
  
  
  Save the converted variants first:
  
  Before attempting to change the material group, ensure that all changes to the variant characteristics or converted variants are saved.
  Use the appropriate save function or transaction to commit the changes.
  
  
  
  Check for unsaved changes:
  
  Verify if there are any unsaved changes in the variant characteristics or classification data.
  Save or discard these changes before modifying the material group.
  
  
  
  Process sequence:
  
  First, complete the conversion and save the variant characteristics.
  Then, proceed to change the material group.
  
  
  
  Technical check:
  
  If the error persists, check for any custom enhancements or user exits that might interfere with the saving process.
  Debug or analyze the enhancement WGDS_ENH128 to understand the validation logic.
  
  
  
  
  Related Information:
  
  Variant Configuration (LO-VC): This module allows the configuration of materials with multiple variants based on characteristics.
  Classification System: Characteristics and classes are used to define variants.
  Material Group: A key field in material master data that groups materials for reporting and control.
  Transactions involved:  
  
  CU50 (Change Class)  
  CU51 (Display Class)  
  MM02 (Change Material)  
  Variant configuration transactions like CU41, CU42, CU43  
  
  
  SAP Notes: Check for any SAP Notes related to WGDS_ENH128 or variant configuration errors.
  Enhancement WGDS_ENH128: This is a user exit or BAdI used to validate changes in variant configuration.
  
  
  Summary:
  
  The error WGDS_ENH128 prevents changing the material group before saving converted variant data.
  Save all changes to variant characteristics first.
  Then proceed to change the material group.
  This ensures data consistency in variant configuration.
  
  
  If you need help with specific transaction steps or debugging, please provide more context or screenshots!