# Final Excel to Access calculation issue

Am trying to convert this Excel formula:

=IFERROR(((1-J11)*I11),"")

On the Access form...

J11 is txtOtherDamage
I11 is txtNetCWT

What would the control be for the field txtFinalCWT where the converted formula would be entered?
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CIOCommented:
Probably:

``````=Nz((1 - txtOtherDamage) * txtNetCWT), 0)
``````
or:

``````=(1 - Nz(txtOtherDamage, 0)) * Nz(txtNetCWT, 0)
``````

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Business Systems Analyst , ex-Senior Application EngineerCommented:
there is no "formula" in Access, hence you can create a function to handle that:

function getValue(byval p1, byval p2) as string
on error goto eh
getValue =  (1-p1)*p2)
eh:
getValue = ""
end function

call it like:

dim rtn as string
rtn = getValue(txtOtherDamage.value, txtNetCWT.value)

or you can use it as a control source
Business Systems Analyst , ex-Senior Application EngineerCommented:
yea, NZ is pretty simple and should be used in your case (I guess). and you can use it to return as "" instead of 0 using below code:

=Nz((1 - txtOtherDamage) * txtNetCWT), "")
Commented:
--->> =Nz((1 - txtOtherDamage) * txtNetCWT), "")

This will not work.
Business Systems Analyst , ex-Senior Application EngineerCommented:
glad to admit that will not work if we put it into Control Source.

hence, a function should handle that instead.

and correction to my function posted earlier (sorry that didn't test it while posting)

``````Function getValue(ByVal p1, ByVal p2) As String
On Error GoTo eh
getValue = (1 - p1) * p2
Exit Function
eh:
getValue = ""
End Function
``````

hence use:

``````=getValue([txtOtherDamage],[txtNetCWT])
``````
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Microsoft Access

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