Message type: E = Error
Message class:  CNVMBTASF - Messages for application specific functions 
Message number: 005
Message text: Ledger Group &1 is not valid
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The SAP error message CNVMBTASF005 indicates that the specified ledger group (denoted as &1 in the message) is not valid in the context of the operation you are trying to perform. This error typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: Invalid Ledger Group: The ledger group specified does not exist in the system. This could be due to a typo or because the ledger group has not been created or activated.
Configuration Issues: The ledger group may not be properly configured in the system, or it may not be assigned to the relevant company code or controlling area. Data Migration Issues: If you are migrating data, the source data may reference a ledger group that is not present in the target system. Authorization Issues: The user executing the operation may not have the necessary authorizations to access the specified ledger group.
Solution: Check Ledger
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