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The Java tPostgresqlSCD V2.3.0 (Windows) tPostgresqlSCD component doesn't handle mixed-case or upper-case table names or column names. The generated code doesn't " enclose either.
For the table name you can get around it by using an escaped " e.g. rather than "CustomerDIM" use "\"CustomerDIM\"". But columns (for keys or SCD Types) are only enterable via a drop-down list and hence cannot be changed.