How To Fix W_CB426 - List and material exclude one another

SAP Error Message - Details

• Message type: E = Error

• Message class: W_CB -

• Message number: 426

• Message text: List and material exclude one another

Self-Explanatory Message

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• What is the cause and solution for SAP error message W_CB426 - List and material exclude one another ?

  SAP Error Message:
  
  W_CB426 - List and material exclude one another
  
  Cause:
  This warning message occurs in SAP when you try to assign or use a material and a material list simultaneously in a context where they are mutually exclusive. In other words, the system does not allow both a material and a material list to be specified together because they represent alternative ways to define the scope of materials.
  For example, in processes like batch determination, availability check, or pricing, you can either specify a single material or a list of materials (material list), but not both at the same time. The system detects this conflict and issues the warning.
  
  Explanation:
  
  Material: A single material master record.
  Material List: A predefined list of materials grouped together for processing convenience.
  
  The system expects either one or the other, but not both, because they serve the same purpose of defining materials for the process.
  
  Solution:
  
  Check your input: Review the transaction or configuration where you entered the material and material list.
  Remove one of the entries: Either specify the single material or the material list, but not both.
  Adjust your selection criteria: If you need to process multiple materials, use the material list only.
  If this occurs in custom code or user exits: Modify the logic to ensure that only one of these parameters is passed to the relevant function/module.
  
  
  Related Information:
  
  This message is a warning (W_), so it may not stop processing but indicates a potential issue.
  Commonly encountered in:
  
  Batch determination (e.g., in production or sales order processing)
  Pricing procedures where material conditions are applied
  Availability checks or ATP (Available to Promise) scenarios
  
  
  Check SAP Notes or documentation related to the specific module you are working in (e.g., SD, MM, PP) for more context.
  If you want to suppress the warning, ensure your business process logic aligns with SAP’s expected input.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Message
  W_CB426 - List and material exclude one another
  
  
  Cause
  Both material and material list specified simultaneously where only one is allowed
  
  
  Solution
  Use either material or material list, not both; adjust input or configuration accordingly
  
  
  Context
  Batch determination, pricing, availability check, etc.
  
  
  
  
  If you provide the exact transaction or scenario where this message appears, I can help with more tailored advice.