How To Fix CNVA_20400_CHECK035 - An explicit merge of cycles by a cycle mapping was detected.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVA_20400_CHECK - Messages for contorlling areas checks

• Message number: 035

• Message text: An explicit merge of cycles by a cycle mapping was detected.

An explicit merge of cycles by a cycle mapping was detected. Cycles
can't be merged. You have to specify another mapping.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNVA_20400_CHECK035 - An explicit merge of cycles by a cycle mapping was detected. ?

  The SAP error message CNVA_20400_CHECK035 indicates that there is an issue related to cycle mapping in the context of data migration or transformation processes, particularly when using the SAP Landscape Transformation (SLT) or SAP Data Services. This error typically arises when the system detects an explicit merge of cycles, which can lead to data integrity issues.
  Cause:
  The error is caused by the presence of circular references in the data model or mapping configuration. Specifically, it occurs when the system identifies that a cycle is being merged explicitly, which is not allowed because it can create ambiguity in data processing and lead to inconsistent results.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Cycle Mapping Configuration:
  
  Check the cycle mapping configuration in your data transformation or migration setup. Ensure that there are no circular references in the mapping logic.
  
  
  
  Identify and Break Cycles:
  
  Analyze the data model to identify any cycles. You may need to break these cycles by restructuring the data flow or modifying the mapping logic to eliminate circular dependencies.
  
  
  
  Use Alternative Mapping Strategies:
  
  If cycles are necessary for your data model, consider using alternative mapping strategies that do not involve explicit merges of cycles. This may involve creating intermediate steps or using different transformation techniques.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the specific tool you are using (e.g., SAP Data Services, SLT) to understand the best practices for handling cycles in data mapping.
  
  
  
  Testing:
  
  After making changes, thoroughly test the data migration or transformation process to ensure that the error is resolved and that data integrity is maintained.
  
  
  
  Seek Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support or consulting with an SAP expert who can provide guidance based on your specific scenario.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error.
  Data Model Design: Understanding best practices in data model design can help prevent such issues in the future.
  Documentation: Review the official SAP documentation for the tools you are using, as they often contain troubleshooting sections for common errors.
  
  By following these steps, you should be able to address the CNVA_20400_CHECK035 error and ensure a smooth data migration or transformation process.