Seaquel
SQL Server error code

SQL Server error 7643

SQL Server raises error 7643 at severity 16, which marks a problem with the query or data that you can correct.

Cannot use a CONTAINS or FREETEXT predicate on %S_MSG '%.*ls' because none of its columns are full-text indexed.
Msg7643
Severity16
Group7000–7999

Source: Database Engine events and errors