How To Fix /SAPAPO/ATP449 - Period start is after the period end

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/ATP -

• Message number: 449

• Message text: Period start is after the period end

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/ATP449 - Period start is after the period end ?

  The SAP error message /SAPAPO/ATP449 indicates that there is a problem with the time period defined for an Availability Check (ATP - Available to Promise) in the Advanced Planning and Optimization (APO) module. Specifically, the error states that the "period start is after the period end," which means that the start date of the period you are trying to define or use is later than the end date.
  Cause:
  
  Incorrect Date Configuration: The start date and end date for the period in the ATP check are incorrectly configured, leading to a logical inconsistency.
  Data Entry Error: A user may have mistakenly entered the dates in the wrong order.
  Master Data Issues: The master data for the product or location may have incorrect date settings.
  Planning Version Issues: The planning version being used may have conflicting date settings.
  
  Solution:
  
  
  Check Date Configuration:
  
  Go to the configuration settings for the ATP check and verify the defined periods. Ensure that the start date is earlier than the end date.
  
  
  
  Correct Data Entry:
  
  If the error is due to manual data entry, correct the dates in the relevant transaction or configuration screen.
  
  
  
  Review Master Data:
  
  Check the master data for the product or location involved in the ATP check. Ensure that all date-related fields are correctly set.
  
  
  
  Planning Version:
  
  Verify the planning version settings. Ensure that the version you are using does not have conflicting date definitions.
  
  
  
  Testing:
  
  After making the necessary corrections, perform a test ATP check to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like /SAPAPO/ATC (for ATP checks) or /SAPAPO/SDP94 (for planning book) to access the relevant settings.
  Documentation: Refer to SAP Help documentation for detailed information on configuring ATP checks and managing periods.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on this error message.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or APO consultant for further investigation.