How To Fix /SAPAPO/RRP_HEUR645 - Error reading master data

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/RRP_HEUR -

• Message number: 645

• 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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/RRP_HEUR645 - Error reading master data ?

  The SAP error message /SAPAPO/RRP_HEUR645 Error reading master data typically occurs in the context of Advanced Planning and Optimization (APO) when the system is unable to access or read the necessary master data for a planning heuristic or process. This can hinder the execution of planning runs, such as those for production planning or demand planning.
  Causes:
  
  Missing Master Data: The required master data (like material master, location master, or resource master) may not exist in the system.
  Inconsistent Data: There may be inconsistencies or errors in the master data that prevent it from being read correctly.
  Authorization Issues: The user executing the planning run may not have the necessary authorizations to access the master data.
  Data Locking: The master data might be locked by another process or user, preventing access.
  Configuration Issues: Incorrect configuration settings in the APO system can lead to issues in reading master data.
  
  Solutions:
  
  Check Master Data: Verify that all required master data is present and correctly maintained in the system. This includes checking for the existence of materials, locations, and resources.
  Data Consistency Check: Use transaction codes like /SAPAPO/MDM to check for inconsistencies in the master data and correct any issues found.
  Authorization Check: Ensure that the user has the necessary authorizations to access the master data. This can be done by reviewing user roles and authorizations in the system.
  Unlock Data: If the master data is locked, identify the user or process that is locking it and resolve the locking issue.
  Review Configuration: Check the configuration settings in the APO system to ensure they are set up correctly for the planning process being executed.
  System Logs: Review system logs for any additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/MDM for master data management and /SAPAPO/RRP for planning runs.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Documentation: Refer to SAP documentation for APO to understand the requirements and dependencies for master data in planning processes.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or APO support team for further investigation.