Message type: E = Error
Message class:  CNV_21529 - Wagetype Rename 
Message number: 021
Message text: Table T512W does not exist; checks on definitions not possible
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The SAP error message CNV_21529021 indicating that Table T512W does not exist; checks on definitions not possible typically arises during data migration or conversion processes, particularly when using SAP's tools for system conversion or data migration, such as the SAP S/4HANA Migration Cockpit or other data transformation tools.
Cause: Missing Table: The error suggests that the system is trying to access the table T512W, which is not present in the database. This table is usually related to wage types and is part of the SAP HR module. Incorrect Configuration: The absence of the table could be due to an incomplete installation of the SAP system or missing components related to the HR module. Version Mismatch: If you are migrating from an older version of SAP to a newer one, there might be changes in the database schema, and the table might have been deprecated or replaced. Transport Issues: If the system was recently upgraded or
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