How To Fix DMC_RT_MSG101 - Duplicates have been listed in spool log

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_RT_MSG - DMC: Runtime Object Messages

• Message number: 101

• Message text: Duplicates have been listed in spool log

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_RT_MSG101 - Duplicates have been listed in spool log ?

  The SAP error message DMC_RT_MSG101 indicates that there are duplicate entries in the spool log during a data migration or data transfer process. This error typically arises in the context of SAP Data Migration Cockpit (DMC) or similar data transfer tools when the system detects that the same data record is being processed multiple times, which can lead to inconsistencies or errors in the data being migrated.
  Cause:
  
  Duplicate Data Records: The most common cause is that the source data contains duplicate records that are being processed.
  Incorrect Mapping: If the mapping of fields is not set up correctly, it may lead to the same record being processed multiple times.
  Configuration Issues: Misconfiguration in the data migration settings or parameters can also lead to duplicates being generated.
  Batch Processing: If the data is being processed in batches, and the same batch is being executed multiple times, it can result in duplicates.
  
  Solution:
  
  Check Source Data: Review the source data for duplicates. Use tools or queries to identify and remove duplicate records before migration.
  Adjust Mapping: Ensure that the mapping of fields is correct and that it does not inadvertently cause duplicates.
  Review Migration Settings: Check the configuration settings in the Data Migration Cockpit to ensure that they are set up correctly to avoid processing the same records multiple times.
  Use Unique Identifiers: If possible, use unique identifiers for records to prevent duplicates from being processed.
  Log Analysis: Analyze the spool log to identify which records are being flagged as duplicates and take appropriate action to resolve the issue.
  Testing: Conduct thorough testing in a non-production environment to ensure that the migration process works as expected without generating duplicates.
  
  Related Information:
  
  Spool Log: The spool log is a temporary storage area where the output of the data migration process is stored. It can be reviewed to understand the details of the error and the records involved.
  Data Migration Cockpit (DMC): This is a tool provided by SAP for migrating data from legacy systems to SAP systems. It includes features for mapping, validation, and execution of data migration tasks.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional insights or updates related to this error message.
  
  If the issue persists after following these steps, it may be beneficial to consult with SAP support or your technical team for further assistance.