How To Fix CNV_DMC_MC_EXCEPTION138 - Cannot generate migration objects; see long text

CNV_DMC_MC_EXCEPTION138 - Overview

• Message type: E = Error

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

• Message number: 138

• Message text: Cannot generate migration objects; see long text

What causes this issue?

When you choose Generate Migration Object, the system must first check
whether the structures in a migration object are in sync with the same
structures in the ABAP Dictionary. If the structures are not in sync,
the migration objects cannot be generated. To synchronize the structures
in a migration object with the structures in the ABAP Dictionary, in the
menu choose Migration Object and then Synchronize Structures.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION138 - Cannot generate migration objects; see long text ?

  The SAP error message CNV_DMC_MC_EXCEPTION138 typically occurs during the data migration process when using the SAP Data Migration Cockpit (DMC). This error indicates that the system cannot generate migration objects, which are essential for the data migration process.
  Causes:
  
  
  Configuration Issues: There may be misconfigurations in the migration settings or parameters.
  Missing Objects: Required migration objects or structures may be missing in the source or target system.
  Authorization Problems: The user executing the migration may not have the necessary authorizations to create or access migration objects.
  Data Model Issues: There could be inconsistencies or issues in the data model that prevent the generation of migration objects.
  Technical Errors: There may be underlying technical issues, such as database connectivity problems or system performance issues.
  
  Solutions:
  
  Check Configuration: Review the migration configuration settings to ensure they are correctly set up.
  Verify Migration Objects: Ensure that all required migration objects are available and correctly defined in both the source and target systems.
  User