How To Fix PPH_DD129 - Horizon in past for Product &1 Plant &2 MRP Area &3 cannot be negative

SAP Error Message - Details

• Message type: E = Error

• Message class: PPH_DD - Messages for Demand Driven

• Message number: 129

• Message text: Horizon in past for Product &1 Plant &2 MRP Area &3 cannot be negative

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PPH_DD129 - Horizon in past for Product &1 Plant &2 MRP Area &3 cannot be negative ?

  The SAP error message PPH_DD129 indicates that there is an issue with the planning horizon for a specific product in a given plant and MRP area. The error message states that the planning horizon cannot be negative, which typically means that the system is trying to process a planning period that is set in the past.
  Cause:
  
  Negative Planning Horizon: The planning horizon for the product in the specified plant and MRP area is set to a date that is earlier than the current date.
  Configuration Issues: There may be incorrect settings in the MRP (Material Requirements Planning) configuration for the product or plant.
  Data Entry Errors: Incorrect data entry during the setup of the product or MRP area could lead to this error.
  Master Data Issues: The master data for the product, plant, or MRP area may not be correctly maintained, leading to inconsistencies.
  
  Solution:
  
  
  Check Planning Horizon Settings:
  
  Go to the MRP area settings for the product and check the planning horizon configuration. Ensure that it is set to a future date.
  You can find this in the material master under the MRP views.
  
  
  
  Adjust MRP Area Settings:
  
  If the MRP area is incorrectly configured, adjust the settings to ensure that the planning horizon is valid and does not extend into the past.
  
  
  
  Review Master Data:
  
  Check the master data for the product, plant, and MRP area to ensure that all relevant fields are correctly filled out and that there are no inconsistencies.
  
  
  
  Run MRP Again:
  
  After making the necessary adjustments, run the MRP process again to see if the error persists.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for any specific guidelines related to the configuration of MRP areas and planning horizons.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like MM02 (Change Material), MD02 (Single-Item, Multi-Level MRP), or MD04 (Stock/Requirements List) to check and modify the relevant settings.
  MRP Configuration: Familiarize yourself with MRP configuration settings in SAP, as they can vary based on the version and specific implementation of SAP.
  User Roles: Ensure that you have the necessary permissions to make changes to the MRP settings and master data.
  
  By following these steps, you should be able to resolve the PPH_DD129 error and ensure that your planning horizon is correctly set.