How To Fix /SAPAPO/TSTR018 - Error: Start date is later than end date

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TSTR -

• Message number: 018

• Message text: Error: Start date is later than end date

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/TSTR018 - Error: Start date is later than end date ?

  The SAP error message /SAPAPO/TSTR018 indicates that there is a problem with the date range specified in a transaction or process within the SAP Advanced Planning and Optimization (APO) module. Specifically, the error states that the "start date is later than the end date," which means that the dates provided for a particular operation are not logically correct.
  Cause:
  
  Incorrect Date Input: The most common cause of this error is that the user has entered a start date that is later than the end date in a planning transaction or report.
  Data Entry Errors: Mistakes during data entry, such as typographical errors or misinterpretation of date formats, can lead to this issue.
  System Configuration: In some cases, the configuration settings in the APO system may not align with the expected date ranges for certain processes.
  
  Solution:
  
  Check Date Inputs: Review the dates entered in the transaction or report. Ensure that the start date is earlier than the end date.
  Correct Date Format: Make sure that the date format used is consistent with the system settings (e.g., DD/MM/YYYY vs. MM/DD/YYYY).
  Validation: Implement validation checks in the user interface to prevent users from entering invalid date ranges.
  Consult Documentation: Refer to the relevant SAP documentation or help files for the specific transaction to understand the expected date inputs.
  Testing: If the error persists, try to replicate the issue in a test environment to identify any underlying problems with the configuration or data.
  
  Related Information:
  
  Transaction Codes: The error may occur in various transactions within the APO module, such as planning books, demand planning, or supply network planning.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Training: Providing training to users on how to correctly enter date ranges can help reduce the occurrence of this error.
  System Logs: Review system logs for additional context or related errors that may provide further insight into the issue.
  
  By addressing the root cause of the error and ensuring proper date entry practices, you can resolve the /SAPAPO/TSTR018 error effectively.