How To Fix /SAPAPO/TSM021 - Error reading master data

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/TSM -

• Message number: 021

• Message text: Error reading master data

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/TSM021 - Error reading master data ?

  The SAP error message /SAPAPO/TSM021 indicates that there is an issue with reading master data in the SAP Advanced Planning and Optimization (APO) module. This error can occur for various reasons, and understanding the cause is essential for finding a solution.
  Possible Causes:
  
  Missing Master Data: The required master data (like material, location, or resource) may not exist in the system.
  Data Inconsistency: There may be inconsistencies or corruption in the master data.
  Authorization Issues: The user may not have the necessary authorizations to access the master data.
  Data Transfer Issues: Problems during data transfer from SAP ERP to SAP APO can lead to missing or incomplete master data.
  Configuration Issues: Incorrect configuration settings in the APO system can prevent proper access to master data.
  
  Solutions:
  
  Check Master Data: Verify that the required master data exists in the system. You can do this by using transaction codes like MM03 for materials or CIF for checking the integration with SAP ERP.
  Data Consistency Check: Use transaction CIF to check for inconsistencies in the master data. You can also run consistency checks in APO to identify and correct any issues.
  Authorization Check: Ensure that the user has the necessary authorizations to access the master data. You can check this in the user roles and profiles.
  Data Transfer Monitoring: If the issue is related to data transfer, check the CIF logs for any errors or warnings. You can use transaction CIF to monitor the data transfer process.
  Configuration Review: Review the configuration settings in APO to ensure that they are set up correctly. This includes checking the integration model and ensuring that the relevant master data is included.
  Re-upload Master Data: If master data is missing or corrupted, consider re-uploading it from the source system (SAP ERP) to APO.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CIF, MM03, MD04, and SCC1 for data transfer.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to the /SAPAPO/TSM021 error.
  Documentation: Review SAP documentation for APO and master data management for best practices and troubleshooting steps.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or APO support team for further assistance.