Message type: E = Error
Message class:  CNV_CMIS - Message class for CMIS 
Message number: 126
Message text: Tables and Domains Settings are not completed
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The SAP error message CNV_CMIS126 indicates that the tables and domains settings required for a specific conversion or migration process have not been completed. This error typically arises during data migration activities, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools.
Cause: Incomplete Configuration: The necessary settings for tables and domains in the migration cockpit or conversion tool have not been fully configured. Missing Customization: Custom tables or domains that need to be defined for the migration process may not have been created or activated. Incorrect Transport: If the relevant transport requests containing the necessary configurations have not been imported into the target system, this error can occur. Authorization Issues: Lack of proper authorizations to access or modify the required settings can also lead to this error.
Solution: Check Configuration: Go to the transaction code CNV_MBT (for Migration Object Modeler) or CNV_MBT_COCKPIT and verify that all necessary tables and domains are correctly configured. Ensure
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