How To Fix CNV_20340_CHECK000 - Implicit cycle merge found

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20340_CHECK - Message Class for 20340 Checks

• Message number: 000

• Message text: Implicit cycle merge found

What causes this issue?

An <DS:TX.CNV_MBT_IMPLICIT_MERGE>implicit merge</> of cycles was
detected. This occurs for example when two controlling areas are merged,
which contain cycles with the same name.
A merge of cycles is not supported. To resolve this issue, you have to
change the mapping values for the cycles.
You cannot run the transformation solution Controlling Area Merge
because certain prerequisites have not been met. Please change your
mapping accordingly.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20340_CHECK000 - Implicit cycle merge found ?

  The SAP error message CNV_20340_CHECK000 with the description "Implicit cycle merge found" 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 there is a cyclic dependency in the data relationships that the system is trying to process, which can prevent the successful execution of the migration.
  Cause:
  The error is usually caused by:
  
  Cyclic Dependencies: There are relationships in the data that create a cycle. For example, if entity A references entity B, and entity B references entity A, this creates a cycle that the migration process cannot resolve.
  Incorrect Data Mapping: The mapping of data between source and target systems may not be correctly defined, leading to cycles in the data relationships.
  Data Integrity Issues: The source data may have integrity issues, such as missing or incorrect references, which can lead to cycles when the data is being processed.
  
  Solution:
  To resolve the CNV_20340_CHECK000 error, you can take the following steps:
  
  
  Analyze Data Relationships: Review the data relationships in your source data to identify any cyclic dependencies. You may need to visualize the relationships to see where the cycles occur.
  
  
  Adjust Data Mapping: Ensure that the data mapping in your migration project is correct. Make sure that the relationships are defined in a way that avoids cycles.
  
  
  Data Cleansing: Cleanse the source data to remove any inconsistencies or integrity issues. This may involve correcting references or removing problematic records.
  
  
  Sequential Processing: If possible, process the data in a sequence that avoids cycles. For example, you might need to load certain entities before others to break the cycle.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be specific guidelines or best practices for handling cyclic dependencies.
  
  
  Use SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They may provide insights specific to your scenario or help troubleshoot the underlying cause.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV_20340_CHECK000 error in your SAP data migration process.