How To Fix /SAPAPO/ATP269 - Finish date lies before start date - the system will switch the dates

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 269

• Message text: Finish date lies before start date - the system will switch the dates

Self-Explanatory Message

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• What is the cause and solution for SAP error message /SAPAPO/ATP269 - Finish date lies before start date - the system will switch the dates ?

  The SAP error message /SAPAPO/ATP269 indicates that there is a discrepancy between the finish date and the start date of a process or activity in the Advanced Planning and Optimization (APO) module. Specifically, it means that the finish date is earlier than the start date, which is logically incorrect. As a result, the system will automatically switch the dates to correct the inconsistency.
  Cause:
  
  Data Entry Error: The most common cause is a manual data entry error where the finish date is incorrectly set before the start date.
  Planning Parameters: Incorrect planning parameters or settings in the system that lead to the generation of invalid dates.
  Master Data Issues: Problems with master data, such as incorrect lead times or scheduling parameters, can also lead to this error.
  Integration Issues: If there are integrations with other systems (like ERP), data inconsistencies can arise from those systems.
  
  Solution:
  
  Review Dates: Check the start and finish dates in the relevant planning object (e.g., production order, planned order, etc.) to ensure they are set correctly.
  Correct Data Entry: If the dates are incorrect, manually correct them to ensure that the finish date is after the start date.
  Check Planning Parameters: Review the planning parameters and settings in the APO system to ensure they are configured correctly.
  Master Data Validation: Validate the master data related to the product, including lead times, production times, and any other relevant parameters.
  Integration Check: If applicable, check the integration with other systems to ensure that data is being transferred correctly and that there are no discrepancies.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like /SAPAPO/SDP94 (for planning board) or /SAPAPO/MC90 (for checking planning data) to analyze the planning data.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or bugs related to this error message.
  Documentation: Refer to SAP documentation for APO and ATP (Available-to-Promise) processes for more detailed information on how dates are managed and validated.
  User Exits or BAdIs: If custom logic is implemented, review any user exits or BAdIs that might affect date calculations.
  
  By following these steps, you should be able to identify the root cause of the error and implement the necessary corrections to resolve it.