How To Fix CNV_10100321 - Duplicate check of set class &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10100 - Messages from package 10100

• Message number: 321

• Message text: Duplicate check of set class &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10100321 - Duplicate check of set class &1 ?

  The SAP error message CNV_10100321 indicates that there is a duplicate entry in a set class during a data migration or conversion process. This error typically arises when the system detects that the same set class is being processed more than once, which violates the uniqueness constraint expected in the data model.
  Cause:
  
  Duplicate Data: The most common cause is that the data being imported or processed contains duplicate entries for the specified set class.
  Incorrect Mapping: There may be an issue with the mapping of data from the source system to the target system, leading to the same set class being referenced multiple times.
  Configuration Issues: There could be configuration settings in the migration tool or the target system that are not set up correctly, allowing duplicates to be processed.
  
  Solution:
  
  Identify Duplicates: Review the data being processed to identify any duplicate entries for the set class in question. This can often be done using SQL queries or data analysis tools.
  Data Cleansing: Remove or consolidate duplicate entries in the source data before attempting the migration again. Ensure that each set class is unique.
  Check Mapping: Verify the mapping configuration to ensure that it correctly reflects the intended relationships and does not inadvertently create duplicates.
  Adjust Configuration: If applicable, review the configuration settings of the migration tool to ensure that it is set up to handle duplicates appropriately.
  Testing: After making the necessary adjustments, conduct a test migration with a smaller dataset to ensure that the issue has been resolved before proceeding with the full migration.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may want to check transaction codes related to data migration, such as LSMW (Legacy System Migration Workbench) or other specific tools used for data conversion.
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or patches related to this error message.
  Documentation: Review the documentation for the specific migration tool or process you are using, as it may contain guidelines on handling duplicates.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with a technical expert who specializes in SAP data migration.