How To Fix /SAPAPO/TSM123 - Planning horizon is smaller than past horizon of the forecast

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TSM -

• Message number: 123

• Message text: Planning horizon is smaller than past horizon of the forecast

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/TSM123 - Planning horizon is smaller than past horizon of the forecast ?

  The SAP error message /SAPAPO/TSM123 Planning horizon is smaller than past horizon of the forecast typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is a mismatch between the planning horizon set in the system and the historical data available for forecasting.
  Cause:
  
  Planning Horizon Configuration: The planning horizon defined in the system is shorter than the historical data (past horizon) that the forecast is trying to utilize. This means that the system is attempting to use historical data that extends beyond the defined planning horizon.
  Forecasting Settings: The settings for the forecasting model may not align with the planning horizon, leading to this error.
  Data Integrity Issues: There may be issues with the data integrity or configuration that cause the system to misinterpret the planning horizon.
  
  Solution:
  
  
  Adjust the Planning Horizon:
  
  Go to the configuration settings for the planning area in SAP APO.
  Increase the planning horizon to ensure it covers the historical data being used for forecasting.
  This can typically be done in the planning area settings under the "Time Series" or "Forecast" settings.
  
  
  
  Review Forecasting Model:
  
  Check the forecasting model being used and ensure that it is set up correctly to align with the planning horizon.
  If necessary, adjust the model to ensure it does not reference data outside the defined planning horizon.
  
  
  
  Data Review:
  
  Review the historical data to ensure that it is complete and correctly configured.
  Ensure that there are no gaps or inconsistencies in the historical data that could be causing the issue.
  
  
  
  Testing:
  
  After making adjustments, run a test forecast to ensure that the error does not reoccur.
  Monitor the system for any further discrepancies.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message. SAP frequently releases updates that may address known issues.
  Documentation: Refer to the SAP APO documentation for detailed information on configuring planning horizons and forecasting settings.
  Community Forums: Engage with SAP community forums or user groups for insights from other users who may have encountered and resolved similar issues.
  
  By addressing the planning horizon and ensuring it aligns with the historical data, you should be able to resolve the error message /SAPAPO/TSM123.