Message type: E = Error
Message class:  CNV_OM_PRESEL - Messages for LT Object Based Preselection 
Message number: 200
Message text: The selected table is not valid
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The SAP error message CNV_OM_PRESEL200 indicates that the selected table is not valid for the operation you are trying to perform, typically in the context of data migration or conversion processes. This error is often encountered during the use of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other conversion tools. Causes: Invalid Table Selection: The table you are trying to select may not be part of the allowed tables for the specific migration or conversion scenario. Table Not Supported: The table may not be supported in the current version of the migration tool you are using.
Configuration Issues: There may be configuration issues in the migration tool that prevent the selection of certain tables. Authorization Issues: The user may not have the necessary authorizations to access the selected table. Data Model Changes: If you are migrating from an older version of SAP to a newer one, the data model may have
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