How To Fix CNV20551640 - Relevant material numbers must be determined before material classes

CNV20551640 - Overview

• Message type: E = Error

• Message class: CNV20551 - message for package 20551 (company code delete)

• Message number: 640

• Message text: Relevant material numbers must be determined before material classes

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.

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CNV20551640 - Details

• The SAP error message CNV20551640, which states "Relevant material numbers must be determined before material classes," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system is unable to determine the relevant material numbers before it can classify them into material classes.
  
  Cause:
  
  Missing Material Numbers: The relevant material numbers may not have been defined or are missing in the source data.
  Incorrect Mapping: There may be an issue with the mapping of material numbers to material classes in the migration settings.
  Data Structure Issues: The data structure or format of the incoming data may not align with the expected structure in SAP.
  Sequence of Operations: The process may be attempting to classify materials before the system has had a chance to identify or create the material numbers.
  
  
  Solution:
  
  Check Source Data: Ensure that the source data contains all necessary material numbers.