Msg 129, Level 15, State 1, Line 2
Fillfactor %d is not a valid percentage; fillfactor must be between 1 and 100.
This error message appears when you try to specify an invalid fillfactor in a CREATE/ALTER INDEX statement.
The T-SQL statement can be parsed, but causes the error at runtime.
Error of the Severity level 15 are generated by the user and can be fixed by the SQL Server user. The fillfactor must be valid.
All versions of SQL Server.
CREATE INDEX IX_customerid ON Customers(CustomerID)
WITH (FILLFACTOR = 101)
Im the above example we try to specify a fillfactor of 101. This raises the error.