trying to create a view but getting and sql error

SELECT     
	n.N
	, DATEADD(day, n.N, 0) AS day -- nn is incorrect
	, n.EnrollNo
	, n.EMachineNo
	, Start.StartDT
	, Finish.FinishDT
	, CAST(Finish.FinishDT - Start.StartDT AS time) AS ElapsedTime
FROM (
	SELECT     
		nn.N
		, DATEADD(day, nn.N, 0) AS Empday
		, t_1.EnrollNo
		, t_1.EMachineNo
	FROM dbo.Number AS nn 

	CROSS JOIN (
		SELECT DISTINCT 
			tt.EnrollNo
			, tt.EMachineNo
		FROM dbo.tblEmpGenralLog AS tt
	) AS t_1                       
	WHERE      
		(dateadd( day, nn.N, 0 ) >= '1900-05-01'
		and dateadd( day, nn.N, 0 ) < '2030-06-01'
) AS n 
LEFT OUTER JOIN (
	-- why are you not using trable alias's in here
	SELECT     
		EnrollNo
		, EMachineNo
		, DATEDIFF(day, 0, EmpDateTime) AS StartDayNo -- DateTime is a reserved word and thus a bad choice for a column name. You need to delimit this
		, MIN(EmpDateTime) AS StartDT
	FROM dbo.tblEmpGenralLog AS t
	GROUP BY 
		DATEDIFF(day, 0, EmpDateTime)
		, EnrollNo
		, EMachineNo
	) AS Start 
	ON Start.StartDayNo = n.N 
	AND Start.EnrollNo = n.EnrollNo 
	AND Start.EMachineNo = n.EMachineNo 
LEFT OUTER JOIN (
	-- why are you not using trable alias's in here
	SELECT     
		EnrollNo
		, EMachineNo
		, DATEDIFF(day, 0, EmpDateTime) AS FinishDayNo -- DateTime is a reserved word and thus a bad choice for a column name. You need to delimit this
		, MAX(EmpDateTime) AS FinishDT
	FROM dbo.tblEmpGenralLog AS t1
	GROUP BY 
		DATEDIFF(day, 0, EmpDateTime)
		, EnrollNo
		, EMachineNo
	) AS Finish 
	ON Finish.FinishDayNo = n.N 
	AND Finish.EnrollNo = n.EnrollNo 
	AND Finish.EMachineNo = n.EMachineNo
;