How To Fix CNV_CDMC_CA179 - &1 tables have no data

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CDMC_CA - CDMC Clearing Analysis

• Message number: 179

• Message text: &1 tables have no data

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_CDMC_CA179 - &1 tables have no data ?

  The SAP error message CNV_CDMC_CA179 indicates that a specific table (or tables) in the context of a data conversion or migration process does not contain any data. This error is typically encountered during the execution of a data migration project, particularly when using the SAP Conversion Tools or SAP Data Migration Cockpit.
  Cause:
  
  No Data in Source Tables: The most straightforward cause is that the source tables from which data is being migrated are empty. This could be due to a lack of data in the original system or an issue with the extraction process.
  Incorrect Configuration: There may be a misconfiguration in the migration settings or mapping that leads to the system not recognizing or pulling data from the source tables.
  Filter Settings: If there are filters applied during the migration process, they may inadvertently exclude all data from being processed.
  Data Extraction Issues: Problems during the data extraction phase, such as connection issues or incorrect queries, can lead to empty tables.
  Technical Issues: There could be underlying technical issues, such as database corruption or connectivity problems, that prevent data from being accessed.
  
  Solution:
  
  Check Source Data: Verify that the source tables actually contain data. You can do this by running a simple SELECT query on the database to confirm the presence of records.
  Review Migration Configuration: Ensure that the migration settings and mappings are correctly configured. Check if the correct source tables are being referenced and that there are no filters that might exclude data.
  Examine Extraction Process: If you are using an extraction tool, review the logs and settings to ensure that data is being extracted correctly from the source system.
  Test with Sample Data: If possible, try running the migration with a smaller set of data or a different set of tables to see if the issue persists.
  Consult Documentation: Refer to the SAP documentation related to the specific migration tool you are using for any additional troubleshooting steps or known issues.
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error message or provide additional troubleshooting steps.
  Migration Tools: Familiarize yourself with the specific SAP migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) as they may have specific logs or error handling mechanisms.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the CNV_CDMC_CA179 error and implement a solution to resolve it.