Seaquel
SQL Server error code

SQL Server error 4806

SQL Server raises error 4806 at severity 16, which marks a problem with the query or data that you can correct.

SINGLE_CLOB requires a double-byte character set (DBCS) (char) input file. The file specified is Unicode.
Msg4806
Severity16
Group4000–4999

Source: Database Engine events and errors