Seaquel
SQL Server error code

SQL Server error 3050

SQL Server raises error 3050 at severity 16, which marks a problem with the query or data that you can correct.

SQL Server could not send the differential information for database file '%ls' of database '%ls\%ls' to the backup application because the differential information is too large to fit in memory, and an attempt to use a temporary file has failed.
Msg3050
Severity16
Group3000–3999

Source: Database Engine events and errors