Seaquel
SQL Server error code

SQL Server error 3061

SQL Server raises error 3061 at severity 16, which marks a problem with the query or data that you can correct.

The restart-checkpoint file '%ls' could not be opened. Operating system error '%ls'. Make the file available and retry the operation or, restart the RESTORE sequence.
Msg3061
Severity16
Group3000–3999

Source: Database Engine events and errors