Message type: E = Error
Message class:  CNV_MBT_46 - PCL message class 
Message number: 042
Message text: Illegal column name
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The SAP error message CNV_MBT_46042 Illegal column name typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is an issue with the naming of a column in the data being processed.
Cause: Invalid Characters: The column name may contain illegal characters that are not allowed in SAP database table names or field names. This can include special characters, spaces, or names that are too long. Reserved Keywords: The column name might be a reserved keyword in the database or SAP system, which cannot be used as a column name. Naming Conventions: The column name may not adhere to the naming conventions set by SAP, such as length restrictions or format requirements. Data Mapping Issues: During the mapping of source data to target structures, the mapping may have been incorrectly defined, leading to the generation of an illegal column
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