The copy columns, "%1!s!" and "%2!s!", do not have equal data types or are not trivially convertible string types. This occurs ...

The copy columns, "%1!s!" and "%2!s!", do not have equal data types or are not trivially convertible string types. This occurs because copying from reference to output between columns with equal data types, or a DT_STR and DT_WSTR combination, is supported, but other types are not.