Seaquel
SQL Server error code

SQL Server error 8638

SQL Server raises error 8638 at severity 16, which marks a problem with the query or data that you can correct.

The query processor could not produce a query plan because CURSOR fetch queries cannot reference external tables. Ensure that the input request does not contain remote UPDATE or DELETE on external tables.
Msg8638
Severity16
Group8000–8999

Source: Database Engine events and errors