Seaquel
SQL Server error code

SQL Server error 9518

SQL Server raises error 9518 at severity 16, which marks a problem with the query or data that you can correct.

XQuery: The name or one of the parts of a multi-part name that starts with '%.*ls' supplied to %S_MSG() is not a valid SQL identifier - it contains invalid characters.
Msg9518
Severity16
Group9000–9999

Source: Database Engine events and errors