How To Fix /SAPAPO/AMON099 - End date must be later than or same as start date

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/AMON -

• Message number: 099

• Message text: End date must be later than or same as start date

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/AMON099 - End date must be later than or same as start date ?

  The SAP error message /SAPAPO/AMON099 indicates that there is an issue with the date range specified in a planning or monitoring function within the SAP Advanced Planning and Optimization (APO) module. Specifically, the error states that the end date must be later than or the same as the start date. This typically occurs when a user attempts to execute a function that requires a valid date range, but the dates provided do not meet this requirement.
  Cause:
  
  Incorrect Date Input: The most common cause is that the user has entered an end date that is earlier than the start date.
  Default Values: Sometimes, default values for dates may not be set correctly, leading to this error.
  Data Entry Errors: Manual data entry errors can also lead to this issue, such as typographical mistakes in the date fields.
  
  Solution:
  To resolve the error, follow these steps:
  
  Check Date Inputs: Review the start and end dates you have entered. Ensure that the end date is the same as or later than the start date.
  Adjust Dates: If the end date is earlier than the start date, modify the end date to a later date or the same date as the start date.
  Default Settings: If you are using default date settings, check the configuration to ensure that they are set correctly.
  Validation: Implement validation checks in your input forms to prevent users from entering invalid date ranges in the future.
  Testing: After making the necessary adjustments, re-run the process to ensure that the error no longer occurs.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message.
  Documentation: Refer to the SAP APO documentation for guidelines on date handling and planning functions.
  User Training: Consider providing training for users on how to correctly input date ranges in the system to avoid similar errors in the future.
  Support: If the issue persists after checking the dates, consider reaching out to your SAP support team for further assistance.
  
  By ensuring that the date inputs are correct and implementing preventive measures, you can avoid encountering this error in the future.