How To Fix DMCLG529 - Cardinality of sender structure in '&1 << &2' in '&3' and '&4' differs

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 529

• Message text: Cardinality of sender structure in '&1 << &2' in '&3' and '&4' differs

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG529 - Cardinality of sender structure in '&1 << &2' in '&3' and '&4' differs ?

  The SAP error message DMCLG529 indicates a cardinality mismatch in the sender structure during data transfer or transformation processes, particularly in the context of Data Migration or Data Transfer processes in SAP systems. This error typically arises when the expected number of records or elements in a data structure does not match the actual number being processed.
  Cause:
  
  Cardinality Mismatch: The error occurs when the cardinality (the number of instances of a data element) of the sender structure does not match the expected cardinality in the target structure. For example, if the sender structure is expected to have a one-to-many relationship but is defined as one-to-one in the target structure, this error will be triggered.
  Incorrect Mapping: The mapping between the source and target structures may be incorrectly defined, leading to discrepancies in the expected data format.
  Data Quality Issues: The data being processed may contain unexpected values or formats that do not conform to the defined structures, leading to mismatches.
  Configuration Issues: There may be configuration issues in the data transfer process, such as incorrect settings in the Data Transfer Workbench (DTW) or other data migration tools.
  
  Solution:
  
  Review Data Structures: Check the definitions of the sender and target structures to ensure that their cardinalities match. This includes reviewing the data model and understanding the relationships between different entities.
  Adjust Mapping: If the mapping is incorrect, adjust it to ensure that the cardinality aligns with the expected structure. This may involve changing the mapping rules or modifying the data transformation logic.
  Data Validation: Validate the data being processed to ensure it meets the expected formats and values. Cleanse the data if necessary to remove any inconsistencies.
  Configuration Check: Review the configuration settings in the data transfer tool to ensure they are set up correctly. This may involve checking the settings in the Data Transfer Workbench or any other relevant tools.
  Testing: After making adjustments, conduct tests to ensure that the changes resolve the error and that data is being transferred correctly.
  
  Related Information:
  
  Documentation: Refer to SAP documentation related to data migration and transfer processes for detailed guidelines on structure definitions and cardinality.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the DMCLG529 error and implement a solution to resolve it.