How To Fix LTR2_CHANGELOG105 - Source cardinality changed

SAP Error Message - Details

• Message type: E = Error

• Message class: LTR2_CHANGELOG -

• Message number: 105

• Message text: Source cardinality changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message LTR2_CHANGELOG105 - Source cardinality changed ?

  The SAP error message LTR2_CHANGELOG105 indicates that there is a change in the source cardinality of a data source in the context of SAP Landscape Transformation (SLT) Replication. This typically occurs when the structure of the source table has been modified in a way that affects the number of records or the relationships between records.
  Cause:
  The error is usually triggered by one of the following scenarios:
  
  Schema Changes: Changes in the source table schema, such as adding or removing columns, changing data types, or modifying primary keys.
  Cardinality Changes: Changes in the relationships between tables, such as moving from a one-to-many relationship to a many-to-many relationship, or vice versa.
  Data Model Changes: Changes in the underlying data model that affect how data is related or how it should be replicated.
  
  Solution:
  To resolve the LTR2_CHANGELOG105 error, you can follow these steps:
  
  
  Analyze the Changes: Review the changes made to the source table or data model. Identify what modifications have been made that could affect cardinality.
  
  
  Adjust SLT Configuration:
  
  If the changes are valid and intended, you may need to adjust the SLT configuration to accommodate the new structure. This could involve:
  
  Updating the replication settings.
  Modifying the mapping of fields in the SLT configuration.
  Ensuring that the primary keys and foreign keys are correctly defined.
  
  
  
  
  
  Reinitialize the Replication: In some cases, it may be necessary to reinitialize the replication for the affected tables. This can be done by:
  
  Stopping the replication for the affected table.
  Deleting the existing data in the target table.
  Reconfiguring the SLT settings if necessary.
  Starting the replication again to pull the data with the new structure.
  
  
  
  Check for Consistency: Ensure that the data in the source and target systems is consistent after making the changes. You may need to run consistency checks or validation processes.
  
  
  Consult Documentation: Refer to the SAP documentation for SLT and the specific error message for additional guidance and best practices.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error.
  SLT Monitoring: Use the SLT monitoring tools to get more details about the replication process and identify any other potential issues.
  Community Forums: Engage with SAP community forums or support channels for shared experiences and solutions from other users who may have encountered the same issue.
  
  By following these steps, you should be able to address the LTR2_CHANGELOG105 error and ensure that your SLT replication is functioning correctly.