How To Fix W+659 - Material group does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: W+ -

• Message number: 659

• Message text: Material group does not exist

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W+659 - Material group does not exist ?

  Certainly! Here's a detailed explanation for the SAP error message W+659 Material group does not exist:
  
  Error Message
  W+659 Material group does not exist
  
  Cause
  This warning message occurs when you try to assign or use a material group in SAP that has not been defined or created in the system. Material groups are used to classify materials for reporting, pricing, and organizational purposes. If the material group code entered does not exist in the material group master data, SAP issues this warning.
  
  Explanation
  
  Material groups are maintained in SAP via transaction OMS2 or through IMG path:
  
  Logistics - General ? Material Master ? Settings for Key Fields ? Define Material Groups
  When creating or changing a material master record (MM01/MM02), if you enter a material group that is not defined in the system, SAP cannot validate it and throws this warning.
  This message is a warning (W), not an error, so the system may allow you to proceed, but it is recommended to correct it to maintain data consistency.
  
  
  Solution
  
  
  Check the Material Group Code:
  
  Verify the material group code you are entering is correct and does not contain typos.
  
  
  
  Create or Maintain the Material Group:
  
  Use transaction OMS2 to create or maintain material groups.
  Path:
  
  SPRO ? Logistics General ? Material Master ? Settings for Key Fields ? Define Material Groups
  Add the missing material group code with a description.
  
  
  
  Use an Existing Material Group:
  
  If the material group is not supposed to be new, select an existing valid material group.
  
  
  
  Check Authorizations:
  
  Ensure you have the necessary authorization to create or maintain material groups.
  
  
  
  
  Additional Information
  
  Material groups help in grouping materials for pricing, reporting, and inventory management.
  Consistent use of material groups improves data quality and reporting accuracy.
  This warning can appear during material master creation/change or during data upload (e.g., LSMW, BAPI) if invalid material groups are used.
  If you want to suppress this warning (not recommended), you can check the message control settings, but it is better to fix the root cause.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Message Type
  Warning (W)
  
  
  Message Number
  W+659
  
  
  Cause
  Material group code does not exist in SAP master data
  
  
  Solution
  Create or correct the material group in OMS2 or use an existing valid group
  
  
  Transaction
  OMS2 (Maintain Material Groups), MM01/MM02 (Material Master)
  
  
  
  
  If you need help with the exact steps in OMS2 or MM01/MM02, feel free to ask!