Sql recursive error invalid column name CTE - visual-studio-2010

Question

I have done following CTE it works fine,but I need to get sum of the last node so the problem is when I add T1.Debit Column to be calculated its give me an invalid column name 'Debit' !!! on line ***
ALTER Function [dbo].[SubTopics_GetSum]
-- Add the parameters for the stored procedure here
(
#TopicID int
)
RETURNS TABLE
AS
RETURN
(
-- Add the SELECT statement with parameter references here
WITH cte
AS (
SELECT
T1.TopicID,
T1.Code,
T1.Description,
T1.ParentID,
T1.ParentID AS NewParentID,
CAST(T1.Code AS nvarchar(MAX)) AS TopicCode,
CAST(T1.Description AS nvarchar(MAX)) AS TopicDescription,
isnull((Accounting.DocumentDetail.Debit),0) AS Debit,
isnull((Accounting.DocumentDetail.Credit),0) AS Credit
FROM Accounting.Topics AS T1
LEFT OUTER JOIN Accounting.DocumentDetail
ON T1.TopicID = Accounting.DocumentDetail.TopicFK
where NOT EXISTS(
SELECT
T2.TopicID,
T2.Code,
T2.Description,
T2.ParentID,
isnull((Accounting.DocumentDetail.Debit),0) AS Debit,
isnull((Accounting.DocumentDetail.Credit),0) AS Credit
FROM Accounting.Topics AS T2
LEFT OUTER JOIN Accounting.DocumentDetail
ON T2.TopicID = Accounting.DocumentDetail.TopicFK
WHERE (ParentID = T1.TopicID)
)
UNION ALL
SELECT
c.TopicID,
c.Code,
c.Description,
c.ParentID,
T1.ParentID AS NewParentID,
CAST(T1.Code AS nvarchar(MAX)) + c.TopicCode AS TopicCode,
CAST(T1.Description AS nvarchar(MAX)) + ' - ' + c.TopicDescription AS TopicDescription,
*** isnull((T1.Debit),0)+isnull(c.Debit,0) AS Debit,--IN THIS LINE error 'Invalid Column Name 'Debit''
isnull(c.Credit,0) AS Credit
FROM cte AS c
INNER JOIN Accounting.Topics AS T1
ON T1.TopicID = c.NewParentID
)
SELECT isnull(sum(Debit),0)AS Debit,
isnull(sum(Credit),0)AS Credit
FROM cte AS c
WHERE (NewParentID = #TopicID)
)
let me know whats wrong with my code confused !!!
actually it doesn't return me a last node sum of debit,credit ... !!!
check following pic

Answer 1

I think below code will help,
ALTER FUNCTION [dbo].[Subtopics_getsum]
-- Add the parameters for the stored procedure here
(#TopicID INT)
returns TABLE
AS
RETURN (
-- Add the SELECT statement with parameter references here
WITH cte
AS (SELECT T1.topicid,
T1.code,
T1.description,
T1.parentid,
T1.parentid AS
NewParentID
,
Cast(T1.code AS NVARCHAR(max))
AS TopicCode,
Cast(T1.description AS NVARCHAR(max)) AS
TopicDescription,
Isnull(( accounting.documentdetail.debit ), 0) AS Debit,
Isnull(( accounting.documentdetail.credit ), 0) AS Credit
FROM accounting.topics AS T1
LEFT OUTER JOIN accounting.documentdetail
ON T1.topicid =
accounting.documentdetail.topicfk
WHERE NOT EXISTS(SELECT T2.topicid,
T2.code,
T2.description,
T2.parentid,
Isnull(( accounting.documentdetail.debit ), 0)
AS
Debit,
Isnull(( accounting.documentdetail.credit ), 0) AS
Credit
FROM accounting.topics AS T2
LEFT OUTER JOIN accounting.documentdetail
ON T2.topicid =
accounting.documentdetail.topicfk
WHERE ( parentid = T1.topicid )))
SELECT Isnull(Sum(debit), 0) AS Debit,
Isnull(Sum(credit), 0)AS Credit
FROM cte AS c
WHERE ( newparentid = #TopicID )
)

Answer 2

I think you Accounting.Topics hasn't column Debit.
UPDTAE
isnull((T1.Debit),0)+isnull(c.Debit,0) AS Debit,--IN THIS LINE error 'Invalid Column Name 'Debit''
isnull(c.Credit,0) AS Credit
FROM cte AS c
INNER JOIN Accounting.Topics AS T1
ON T1.TopicID = c.NewParentID
In the code above your T1.Debit refers to Accounting.Topics.