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

WRF_WLAY_XI_PROXY021 - Overview

• 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