Invalid Column in SQL SubQuery - sql-server-2012

Question

I am trying to run a query below and I am getting the following errors and unable to figure out.
Please look at how column AllocPer is being calculated. That's where the errors are coming from:
Msg 207, Level 16, State 1, Procedure USP_RS_Dealio_JLL_ECRDetails_test, Line 688
Invalid column name 'dealid'.
Msg 207, Level 16, State 1, Procedure USP_RS_Dealio_JLL_ECRDetails_test, Line 689
Invalid column name 'empid'.
My SQL code:
SELECT
MarketPerDiff, CommissionDate, empid, dealid
INTO
#vwDealEmpSplitDetail_Emp
FROM
dbo.vwDealEmpSplitDetail_Emp
PRINT 'Query 1 Starts at ' + CONVERT(nvarchaR(36), getdate(), 114)
SET# t1 = GETDATE()
SELECT
Per.enddate "CommEndDate",
'Period ' + CAST(Per.Period AS VARCHAR) "SubPeriod",
Col.EligibleDate AS "CollectionDate",
Col.DealID,
Client.clientName,
Deal.DealName,
Col.EmpID AS "ProfID",
Emp.FullName AS "ProfName",
SUM(ISNULL(Col.CashCollected, 0)) CashCollected,
Stat.MarketID,
Stat.OpUnit,
HB.Description,
SUM(ISNULL(Col.CostHurdle, 0)) AS "DEmpCostHurdle",
ISNULL(Prof.DealCostMultiplier, 50)[DealCostMultiplier],
(SELECT SUM(MarketPerDiff) "MarketPerDiff"
FROM #vwDealEmpSplitDetail_Emp
WHERE #vwDealEmpSplitDetail_Emp.dealid = Deal.DealID AND
#vwDealEmpSplitDetail_Emp.empid = Emp.EmpID) as AllocPer
INTO
#SummedValues
FROM
tblEmpCollectionAdj Col WITH(NOLOCK)
JOIN
tblDeal Deal WITH(NOLOCK) ON Deal.DealID = Col.DealID
LEFT JOIN
dbo.tblClient Client WITH(NOLOCK) ON Client.ClientCode = Deal.ClientCode
JOIN
tblMktOpUnitCompStatus Stat WITH(NOLOCK) ON Stat.BatchID = Col.BatchID
LEFT JOIN
dbo.tblEmployee Emp WITH(NOLOCK) ON Emp.EmpID = Col.EmpID AND Emp.Active = 1
LEFT JOIN
dbo.tblCommPeriod Per WITH(NOLOCK) ON Col.EligibleDate BETWEEN Per.StartDate AND Per.Enddate
LEFT JOIN
tblEmpCompProfile Prof WITH(NOLOCK) ON Prof.EmpID = Col.EmpId
AND Prof.Active = 1
AND Prof.PeriodID = #PeriodId
AND Prof.Batchid = Col.Batchid
LEFT JOIN
tblHBAlloc HB ON HB.HBAcctEmpID = Prof.EmpID
AND HB.OpUnit = Prof.OpUnit
AND HB.CF3 = Prof.MarketId
AND HB.FiscalYear = #Year1
WHERE
Col.Active = 1
AND Deal.Active = 1
AND Col.PeriodId = #PeriodId
AND ISNULL(Col.CashCollected, 0) + ISNULL(Col.CostHurdle, 0) NOT BETWEEN - .01 AND.01
GROUP BY
Per.enddate,
'Period ' + CAST(Per.Period AS VARCHAR),
Col.EligibleDate, Col.DealID, Client.clientName,
Deal.DealName,
Col.EmpID,
Emp.FullName,
Col.CashCollected,
Stat.MarketID, Stat.OpUnit,
HB.Description,
ISNULL(Prof.DealCostMultiplier, 50),
deal.dealid, Emp.empid, Per.StartDate, Per.Enddate
PRINT 'Query 1 Ends ' + CONVERT(nvarchaR(36), getdate(), 114)
SET# t2 = GETDATE()
PRINT ' TIME ELAPSED ' + CAST(DATEDIFF(millisecond, #t1, #t2) AS NVARCHAR(255))

Answer 1

The error should be self-explanitory. It seems that you are referencing a column that does not exist in a table you are trying to access it from. Without access to your table structure, unfortunately we can only guess at the issue. However, your error says that the columns dealid and empid are invalid. I see that they are being used in several places.
Check to ensure that dealid exists in the following tables/views: tblEmpCollectionAdj, vwDealEmpSplitDetail_Emp, tblDeal.
And check that empid exists in the following tables/views: vwDealEmpSplitDetail_Emp, tblEmpCollectionAdj, tblEmployee, tblEmpCompProfile.
Also, a point that #Blorgbeard mentioned in a comment, check that you are using the proper casing for the column and for table aliases. You have the table tblDeal aliased as Deal, however you reference it as deal in at least one place.