How To Fix CNV_DMC_MC_EXCEPTION139 - Simulation not possible for migration objects that use staging tables

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 139

• Message text: Simulation not possible for migration objects that use staging tables

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION139 - Simulation not possible for migration objects that use staging tables ?

  The SAP error message CNV_DMC_MC_EXCEPTION139 indicates that a simulation is not possible for migration objects that utilize staging tables. This error typically arises during the data migration process when using the SAP Data Migration Cockpit (DMC) or similar tools.
  Cause:
  
  Staging Tables: The migration object you are trying to simulate relies on staging tables, which are temporary tables used to hold data before it is migrated to the target system. The simulation process may not support these types of objects because it requires a direct mapping to the target structure without intermediate steps.
  Configuration Issues: There may be configuration issues in the migration object setup that prevent the simulation from being executed properly.
  Data Integrity: The data in the staging tables may not meet the necessary integrity constraints or may be incomplete, leading to the inability to perform a simulation.
  
  Solution:
  
  Check Migration Object: Review the migration object configuration to ensure that it is set up correctly and that it does not rely on staging tables for the simulation process.
  Use Direct Migration: If the simulation is not possible, consider running a direct migration instead of a simulation. This will allow you to see how the data is processed without the need for a simulation step.
  Review Data in Staging Tables: Ensure that the data in the staging tables is complete and meets all necessary integrity constraints. You may need to clean or transform the data before attempting the simulation again.
  Consult Documentation: Refer to the SAP documentation for the Data Migration Cockpit or the specific migration object you are using to understand the limitations and requirements for simulations.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They may provide insights specific to your system configuration or the migration object in question.
  
  Related Information:
  
  SAP Data Migration Cockpit (DMC): This tool is used for migrating data from legacy systems to SAP S/4HANA or other SAP systems. Understanding its functionalities and limitations is crucial for successful data migration.
  Migration Objects: These are predefined structures that define how data is to be migrated from the source to the target system. Each migration object may have specific requirements and constraints.
  Staging Tables: Temporary tables used during the data migration process to hold data before it is transferred to the final destination. Understanding their role can help in troubleshooting issues related to data migration.
  
  By addressing the above points, you should be able to resolve the CNV_DMC_MC_EXCEPTION139 error and proceed with your data migration tasks.