How To Fix /SAPAPO/PDRP401 - The number of workdays must be greater than or equal to 0

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/PDRP -

• Message number: 401

• Message text: The number of workdays must be greater than or equal to 0

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/PDRP401 - The number of workdays must be greater than or equal to 0 ?

  The SAP error message /SAPAPO/PDRP401 indicates that there is an issue with the configuration of workdays in the context of the SAP Advanced Planning and Optimization (APO) module, specifically related to the Demand Planning or Supply Network Planning functionalities. The error message states that the number of workdays must be greater than or equal to 0, which suggests that a negative value or an invalid configuration has been entered.
  Cause:
  
  Negative Workdays Configuration: The most common cause of this error is that the system is trying to process a planning scenario where the number of workdays has been set to a negative value.
  Incorrect Planning Parameters: The planning parameters or settings in the planning book or data view may have been incorrectly defined.
  Calendar Settings: The calendar settings in the APO system may not be correctly configured, leading to an invalid number of workdays being calculated.
  Data Entry Errors: Manual data entry errors in the planning book or master data could lead to this issue.
  
  Solution:
  
  
  Check Workdays Configuration:
  
  Navigate to the relevant planning book or data view and check the settings for workdays. Ensure that the number of workdays is set to a valid non-negative value.
  
  
  
  Review Planning Parameters:
  
  Go to the planning parameters in the APO system and verify that all values are correctly defined. Adjust any parameters that may be causing the issue.
  
  
  
  Verify Calendar Settings:
  
  Check the calendar settings in the APO system. Ensure that the factory calendar is correctly defined and that it does not contain any negative values for workdays.
  You can do this by navigating to the transaction code /SAPAPO/MC8C to check the calendar settings.
  
  
  
  Data Validation:
  
  Review the master data and planning data for any inconsistencies or errors. Correct any entries that may be causing the issue.
  
  
  
  Re-run Planning:
  
  After making the necessary adjustments, re-run the planning process to see if the error persists.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/MC8C for calendar settings and /SAPAPO/DP for demand planning.
  SAP Notes: Check for any SAP Notes related to this error message in the SAP Support Portal, as there may be specific patches or updates that address this issue.
  Documentation: Review the SAP APO documentation for best practices on configuring workdays and planning parameters.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or APO support team for further investigation.