Seaquel
SQL Server error code

SQL Server error 525

SQL Server raises error 525 at severity 16, which marks a problem with the query or data that you can correct.

The column that was returned from the nodes() method cannot be converted to the data type %ls. It can only be used with one of the four XML data type methods, exist(), nodes(), query(), and value(), or in IS NULL and IS NOT NULL checks.
Msg525
Severity16
Group0–999

Source: Database Engine events and errors