Aggregate Function error

Experts, I am trying to add the below to a query and after doing so I get an error: "YOu tried to execute a query that does not include the specified expression 'Amount' as part of an aggregate function.

AccrueUSDEquiv: Sum(IIf([CurrencyID]=1,Nz([TAccrueMoINLocalCurr],0),Nz(([TAccrueMoINLocalCurr]*[ExchangeRate]),0)))

Why do I get this error?  The query works fine until I try to add this.
pdvsaProject financeAsked:
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pdvsaProject financeAuthor Commented:
here is the query:

its big
SELECT
tblDraws_Details1.Amount, tblDraws_Details1.ValueDate, tblRepayment.Amount, tblRepayment.Currency, tblRepayment.ValueDate, tblRepayment.PaymentMadeYN, (DSum("Amount","tblDraws_Details1","ID = " & [DrawIDrpmt])+Nz(DSum("Amount","tblRePayment","DrawIDrpmt = " & [DrawIDrpmt] & " and PaymentMadeYN = 'Yes' "),0)) AS Balance, Sum(IIf([CurrencyID]=1,Nz([TAccrueMoINLocalCurr],0),Nz(([TAccrueMoINLocalCurr]*[ExchangeRate]),0))) AS AccrueUSDEquiv, Format([tblRepayment].[ValueDate],"mmmm") AS CurrentMonthToAccrue, ([Balance])*([SiborRate]+[Margin])*([DayCountToMaturity]/360) AS TInterestToMatLocalCur, ([tblRepayment].[ValueDate])-([tblDraws_Details1].[ValueDate]) AS DayCountToMaturity, DLookUp("[MarginRate]","tblInterest_Margin","[FacID]= " & [tblRepayment].[ID_Facility]) AS Margin, tblInterest_Sibor.SiborRate, ([Balance])*([SiborRate]+[Margin])*([DaysToAccrueCurMo]/360) AS [TAccrueCurrMo(InLocalCurr)], tblCurrencyExchange.CurrencyName, [tblRepayment].[ValueDate]-dhFirstDayInMonth([tblRepayment].[valuedate])+1 AS DaysToAccrueCurMo, tblRepayment.Comments
FROM
tblDraws_Details1 INNER JOIN ((tblRepayment LEFT JOIN tblInterest_Sibor ON tblRepayment.ID = tblInterest_Sibor.RpmtID) LEFT JOIN tblCurrencyExchange ON tblRepayment.Currency = tblCurrencyExchange.CurrencyID) ON tblDraws_Details1.ID = tblRepayment.DrawIDrpmt
WHERE
(((Format([tblRepayment].[ValueDate],"mmmm"))=Format(Date(),"mmmm")) AND ((tblDraws_Details1.ID_facility)=15))
ORDER BY
tblDraws_Details1.ID;
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crystal (strive4peace) - Microsoft MVP, AccessRemote Training and ProgrammingCommented:
in order to use SUM, you must use an aggregate function on the rest of the columns such as GROUP BY

optionally, if you don't want to do that, you can use DSUM which needs the fieldname (or expression), table or query name, and conditions for matching
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pdvsaProject financeAuthor Commented:
Hi Crystal,

thank you.  I didnt know I could do that.  I would like to use the Dsum method.  
I simply changed Sum to Dsum and i get a wrong number of arguments error.  
I am sure there is more to it than simply doing what i did.  

what should I do now?  grateful for your help.
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Dale FyeOwner, Developing Solutions LLCCommented:
Yes, but using domain functions in a query is generally considered to be a bad practice.  They are slow to execute, and because the query optimizer cannot use them, the query it generally poorly optimized as well.

I would recommend that you either write correlated sub-queries to get your sums, or write aggregate sub-queries and join them to the other tables in the query.
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crystal (strive4peace) - Microsoft MVP, AccessRemote Training and ProgrammingCommented:
you're welcome

as Dale suggested, a subquery might be better.  You can also make another query and join it in.

the problem using SUM is that you then must apply an aggregate to every column, which is not happening

> "domain functions in a query is generally considered to be a bad practice.  They are slow to execute"
on indexed fields, they actually perform quite well

> "wrong number of arguments error."
post your SQL.  You can also try a subquery ...
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pdvsaProject financeAuthor Commented:
Thank you very much.  I will work on crafting something.  Step by step.  

Have a good night
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crystal (strive4peace) - Microsoft MVP, AccessRemote Training and ProgrammingCommented:
you're welcome ~ happy to help
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