How To Fix WRF_APC311 - Calculating quantities bottom up only makes sense for generic materials

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_APC - Messages for Operational Assortment Planning and Control

• Message number: 311

• Message text: Calculating quantities bottom up only makes sense for generic materials

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• What is the cause and solution for SAP error message WRF_APC311 - Calculating quantities bottom up only makes sense for generic materials ?

  Certainly! Here's a detailed explanation for the SAP error message WRF_APC311: "Calculating quantities bottom up only makes sense for generic materials":
  
  Error Message:
  WRF_APC311: Calculating quantities bottom up only makes sense for generic materials
  
  Cause:
  This error occurs in the context of Advanced Planning and Optimization (APO), specifically during the Product Costing or Demand Planning processes when the system tries to calculate quantities bottom-up for a material that is not a generic material.
  
  Generic materials in SAP APO are materials that represent a group or category of products rather than a specific product. They are often used in planning to aggregate demand or supply.
  The bottom-up calculation method aggregates quantities starting from the lowest level (e.g., components or subassemblies) and rolls them up to the finished product.
  The system expects bottom-up calculations only for generic materials because these materials represent aggregated or planned quantities that can be broken down into components.
  If you try to perform bottom-up quantity calculation for a non-generic (specific) material, the system throws this error because it does not make sense to aggregate quantities from components for a specific material in this context.
  
  
  When does this happen?
  
  During demand planning or supply network planning in APO.
  When the planning run or calculation method is set to bottom-up for a material that is not flagged as generic.
  Possibly during heuristic runs, ATP checks, or product cost calculations where quantity calculation methods are involved.
  
  
  Solution:
  
  
  Check Material Master Settings:
  
  Verify if the material in question is marked as generic in APO.
  In transaction /SAPAPO/MAT1 (Product Master), check the Generic Material indicator.
  If the material is not generic but bottom-up calculation is required, reconsider the planning approach.
  
  
  
  Adjust Planning Strategy:
  
  For non-generic materials, use top-down or other appropriate calculation methods instead of bottom-up.
  Bottom-up calculation should only be used for generic materials that represent aggregated demand.
  
  
  
  Review Planning Profiles and Heuristics:
  
  Check the planning profile or heuristic settings to ensure that bottom-up calculation is not applied to non-generic materials.
  Adjust the calculation method or planning profile accordingly.
  
  
  
  Consult APO Configuration:
  
  If the error occurs during a custom process or enhancement, review the logic to ensure bottom-up calculations are only triggered for generic materials.
  
  
  
  
  Additional Information:
  
  Generic Materials: Used in APO to represent product groups or categories, enabling aggregated planning.
  Bottom-up Calculation: Aggregates quantities from components or lower-level materials to higher-level materials.
  Top-down Calculation: Distributes quantities from higher-level materials down to components.
  This error helps maintain data consistency and logical planning flows in APO.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error Message
  WRF_APC311: Calculating quantities bottom up only makes sense for generic materials
  
  
  Cause
  Bottom-up calculation attempted on a non-generic material
  
  
  Solution
  Use bottom-up calculation only for generic materials; adjust material master or planning method
  
  
  Where to Check
  Material master (/SAPAPO/MAT1), planning profiles, heuristics
  
  
  Context
  APO demand planning, supply network planning, product costing
  
  
  
  
  If you need help with specific transaction codes or configuration steps, feel free to ask!