Message type: E = Error
Message class:  CNV_INDX - Messages for conversion of INDX-like tables 
Message number: 230
Message text: Wrong conversion routine type for field &1 of component &2 (RELID &3)
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The SAP error message CNV_INDX230 indicates that there is a problem with the conversion routine type for a specific field in a component during a data migration or conversion process. This error typically arises in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer processes.
Cause: The error message suggests that the conversion routine defined for a particular field is not compatible with the expected data type or format. This can happen due to several reasons: Incorrect Mapping: The field in question may have been incorrectly mapped to a conversion routine that does not match its data type. Missing Conversion Routine: The required conversion routine for the field may not be defined or may be missing in the system. Data Type Mismatch: The source data type may not match the target data type expected by the conversion routine.
Configuration Issues: There may be issues in the configuration
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