How To Fix MR021 - Internal error while determining the characteristics data for class &

SAP Error Message - Details

• Message type: E = Error

• Message class: MR - Stock overview for generic materials

• Message number: 021

• Message text: Internal error while determining the characteristics data for class &

What causes this issue?

An internal error has occurred while reading the characteristics data
for the class entered (generic material or material group).

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Notify your system administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MR021 - Internal error while determining the characteristics data for class & ?

  The SAP error message MR021, which states "Internal error while determining the characteristics data for class &," typically occurs in the context of classification and variant configuration in SAP. This error indicates that there is an issue with the system's ability to retrieve or process the characteristics data associated with a specific class.
  Causes:
  
  Data Inconsistency: There may be inconsistencies or corruption in the classification data or characteristics associated with the class.
  Missing Characteristics: The characteristics that are expected to be associated with the class may be missing or not properly defined.
  Authorization Issues: The user may not have the necessary authorizations to access the characteristics data.
  System Bugs: There could be a bug in the SAP system or a specific transaction that is causing the error.
  Configuration Issues: Incorrect configuration settings in the classification system or variant configuration may lead to this error.
  
  Solutions:
  
  
  Check Class and Characteristics:
  
  Verify that the class and its associated characteristics are correctly defined in the system.
  Ensure that all required characteristics are assigned to the class.
  
  
  
  Data Consistency Check:
  
  Use transaction codes like CL02 (Change Class) or CL03 (Display Class) to check for any inconsistencies in the class data.
  Run consistency checks for the classification data using transaction CL20N or similar tools.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to access the classification data. Check the user roles and authorizations in transaction SU01.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can analyze the program flow to identify where the error occurs. This may require assistance from a developer or SAP support.
  
  
  
  SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates available that resolve the issue.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including the transaction code and any relevant logs.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL01 (Create Class), CL02 (Change Class), CL03 (Display Class), and CL20N (Mass Maintenance of Classes).
  Documentation: Review SAP documentation related to classification and variant configuration for best practices and troubleshooting tips.
  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 diagnose and potentially resolve the MR021 error in SAP.