Message type: E = Error
Message class:  CNV - Conversion: Messages for Conversion Services (CNCC) 
Message number: 853
Message text: Reloading is not possible for table &. Scenario & is used.
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The SAP error message "CNV853 Reloading is not possible for table &. Scenario & is used." typically occurs in the context of data migration or data conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an issue with reloading data into a specific table due to the scenario being used.
Cause: Data Locking: The table may be locked due to ongoing processes or transactions that are preventing reloading. Incompatible Scenario: The scenario you are trying to use may not support reloading for the specified table. Data Integrity Issues: There may be data integrity issues or constraints that prevent the reloading of data.
Configuration Issues: The configuration of the migration or conversion scenario may not be set up correctly, leading to this error.
Solution: Check Table Locking: Ensure that there are no active transactions or processes that are locking the table. You can use transaction codes like SM12
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