How To Fix WRF_GENERIC_HIER018 - The upper interval limit is less than the lower interval limit

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_GENERIC_HIER - Messages for Package WRF_GENERIC_HIERARCHY

• Message number: 018

• Message text: The upper interval limit is less than the lower interval limit

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_GENERIC_HIER018 - The upper interval limit is less than the lower interval limit ?

  The SAP error message WRF_GENERIC_HIER018 indicates that there is an issue with the hierarchy settings in the system, specifically that the upper interval limit is less than the lower interval limit. This typically occurs in the context of defining intervals for characteristics in a hierarchy, such as in the SAP Advanced Planning and Optimization (APO) module or in other areas where hierarchical data is used.
  Cause:
  The error is caused by a misconfiguration in the interval settings for a characteristic. This can happen if:
  
  The upper limit of an interval is incorrectly set to a value that is less than the lower limit.
  There is a data entry error when defining the intervals.
  There may be inconsistencies in the data that have not been resolved.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Hierarchy Settings:
  
  Navigate to the relevant transaction in SAP where the hierarchy is defined (e.g., transaction /SAPAPO/HEIR for APO).
  Review the intervals defined for the characteristic in question.
  
  
  
  Correct the Interval Limits:
  
  Ensure that the upper limit is greater than or equal to the lower limit for all defined intervals.
  If you find any intervals where the upper limit is less than the lower limit, correct these values.
  
  
  
  Validate Data Entries:
  
  Check for any data entry errors that may have occurred during the setup of the hierarchy.
  Make sure that all intervals are logically defined and do not overlap incorrectly.
  
  
  
  Test Changes:
  
  After making the necessary corrections, test the changes to ensure that the error no longer occurs.
  You may need to re-run any processes that were previously failing due to this error.
  
  
  
  Consult Documentation:
  
  If you are unsure about the correct settings, refer to SAP documentation or guidelines related to the specific module you are working with.
  
  
  
  Seek Help from SAP Support:
  
  If the issue persists after checking and correcting the settings, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may use various transaction codes to access hierarchy settings, such as /SAPAPO/HEIR for APO or other relevant transactions for different modules.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on hierarchy management.
  User Forums: Consider visiting SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to resolve the WRF_GENERIC_HIER018 error and ensure that your hierarchy settings are correctly configured.