How To Fix CNV_10020308 - Cardinality for &1 &2 &3 has not yet been determined

CNV_10020308 - Overview

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 308

• Message text: Cardinality for &1 &2 &3 has not yet been determined

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.

CNV_10020308 - Details

• The SAP error message CNV_10020308 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that the cardinality (the relationship between entities) for a specific data object has not been defined or determined in the context of the migration.
  
  Cause:
  
  Undefined Cardinality: The error suggests that the system is unable to determine how many instances of one entity relate to another. For example, it may not know how many line items correspond to a single header record.
  
  Configuration Issues: There may be missing or incorrect configuration settings in the migration project that prevent the system from understanding the relationships between data entities.
  Data Model Changes: If there have been changes in the data model (e.g., during an upgrade or migration), the cardinality may not have been updated accordingly.
  
  
  Solution:
  
  Check Migration Settings: Review the migration settings and ensure that all necessary configurations