How To Fix W_DFE026 - Define requirement calculation data for package &1 with &2 items

W_DFE026 - Overview

• Message type: E = Error

• Message class: W_DFE - Messages for Function Group WDFE

• Message number: 026

• Message text: Define requirement calculation data for package &1 with &2 items

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message W_DFE026 - Define requirement calculation data for package &1 with &2 items ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  W_DFE026: Define requirement calculation data for package &1 with &2 items
  
  
  Cause:
  This warning message occurs during the Demand Forecasting process in SAP (specifically in the Demand Planning or Demand Forecasting module). It indicates that the system requires you to define the requirement calculation data for a particular package (identified by &1) which contains &2 items.
  In other words, the system is informing you that for the package you are trying to process, the necessary data or parameters for requirement calculation have not been defined or are incomplete. Without this data, the system cannot proceed with the demand forecast calculation for the items in that package.
  
  When does it occur?
  
  When you try to run a demand forecast calculation for a package of materials.
  The package does not have the requirement calculation data set up.
  This data typically includes parameters like forecast model, planning horizon, aggregation