How To Fix WRF_WLAY_XI_PROXY021 - An error occured while reading hierarchy data of material &1

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_WLAY_XI_PROXY - ERP-SOP Integration

• Message number: 021

• Message text: An error occured while reading hierarchy data of material &1

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WRF_WLAY_XI_PROXY021 - An error occured while reading hierarchy data of material &1 ?

  The SAP error message WRF_WLAY_XI_PROXY021 indicates that there was an issue while reading the hierarchy data for a specific material in the system. This error typically occurs in the context of SAP's Advanced Planning and Optimization (APO) or similar modules where material hierarchies are used for planning and reporting purposes.
  Causes:
  
  Missing Hierarchy Data: The material specified in the error message may not have any associated hierarchy data in the system.
  Data Inconsistency: There could be inconsistencies or corruption in the hierarchy data for the material.
  Authorization Issues: The user may not have the necessary authorizations to access the hierarchy data for the specified material.
  System Configuration Issues: There may be configuration issues in the APO or related modules that prevent the system from reading the hierarchy data correctly.
  Technical Issues: There could be underlying technical issues, such as database connectivity problems or issues with the data model.
  
  Solutions:
  
  Check Hierarchy Data: Verify if the hierarchy data for the specified material exists. You can do this by navigating to the relevant transaction in SAP (e.g., using transaction codes like MM03 for material master or CT04 for class types).
  Data Consistency Check: Run consistency checks on the hierarchy data to identify and resolve any inconsistencies. This may involve using transaction codes like RSCUSTV10 or RSCUSTV20 for checking and adjusting settings.
  Authorization Check: Ensure that the user has the necessary authorizations to access the hierarchy data. This can be checked in the user roles and profiles.
  Review Configuration: Check the configuration settings in the APO or related modules to ensure that they are set up correctly. This may involve reviewing settings in the SAP IMG (Implementation Guide).
  Technical Support: If the issue persists, consider reaching out to your SAP Basis or technical support team to investigate any underlying technical issues.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for the specific module you are working with (e.g., APO, SCM) for more context on hierarchy data and its management.
  Community Forums: Engage with 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 identify the root cause of the error and implement an appropriate solution.