How To Fix /PLMI/RCP_MIGRATION815 - Cannot read class &1 (substance &2, alt. &3, vers. &4)

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMI/RCP_MIGRATION -

• Message number: 815

• Message text: Cannot read class &1 (substance &2, alt. &3, vers. &4)

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 /PLMI/RCP_MIGRATION815 - Cannot read class &1 (substance &2, alt. &3, vers. &4) ?

  The SAP error message /PLMI/RCP_MIGRATION815 indicates that the system is unable to read a specific class related to a substance. This error typically occurs during the migration or processing of data in the SAP Product Lifecycle Management (PLM) or related modules, particularly when dealing with substance data in the context of regulatory compliance or material management.
  Cause:
  The error can be caused by several factors, including:
  
  Missing Class Definition: The class specified in the error message may not exist in the system or may have been deleted.
  Incorrect Class Assignment: The substance may be assigned to a class that is not correctly defined or is inactive.
  Version Issues: The version of the substance or class may not be compatible or may not exist in the system.
  Authorization Issues: The user may not have the necessary authorizations to access the class or substance data.
  Data Inconsistencies: There may be inconsistencies in the data that prevent the system from reading the class.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Class Definition:
  
  Go to the class management transaction (e.g., CL02) and verify if the class specified in the error message exists.
  If it does not exist, you may need to create it or restore it from a backup.
  
  
  
  Verify Substance Assignment:
  
  Check the assignment of the substance to the class. Ensure that the substance is correctly assigned to an existing and active class.
  
  
  
  Check Versions:
  
  Verify that the version of the substance and class is correct and that the version specified in the error message exists in the system.
  
  
  
  Review Authorizations:
  
  Ensure that the user encountering the error has the necessary authorizations to access the class and substance data.
  
  
  
  Data Consistency Check:
  
  Run consistency checks on the substance and class data to identify any discrepancies or issues.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific error message for additional guidance or patches that may address the issue.
  
  
  
  Contact SAP Support:
  
  If the issue persists after performing the above checks, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL02 (Change Class), CL03 (Display Class), and other related PLM transactions.
  SAP Notes: Search for SAP Notes related to the error message for any known issues or fixes.
  System Logs: Check system logs (e.g., SLG1) for additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to identify and resolve the cause of the error message /PLMI/RCP_MIGRATION815.