Ms Access DLookup with multi criteria and a Null value

Hello all,

I can not figure out what I am doing wrong with this syntax. I know that I am screwing thing up when filtering data [RemovedBy] for Null only data. My guess is that I am missing or miss placed quotation marks. Help!!!!

DLookup("LotNumber","CM_SOLUTION_USAGE", "[Station] = " & [Forms]![Station Replenishment]![Station] & " And [Solution] =  " & [Forms]![Station Replenishment]![cmbSolution]  & " And [RemovedBy]Is Null")

Thank you!!!
Cobra967Asked:
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareCommented:
Is Station or Solution are Text fields:

DLookup("LotNumber","CM_SOLUTION_USAGE", "[Station] = '" & [Forms]![Station Replenishment]![Station] & "' And [Solution] =  '" & [Forms]![Station Replenishment]![cmbSolution]  & "' And IsNull([RemovedBy])")
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Cobra967Author Commented:
[Station] is a number, [Solution] is a text and [RemovedBy] is a text.
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Cobra967Author Commented:
Thank you Scott but it does not work yet, I get error Run-time 3464.
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Scott McDaniel (Microsoft Access MVP - EE MVE )Infotrakker SoftwareCommented:
Try this:

DLookup("LotNumber","CM_SOLUTION_USAGE", "[Station] = " & [Forms]![Station Replenishment]![Station] & " And [Solution] =  '" & [Forms]![Station Replenishment]![cmbSolution]  & "' And IsNull([RemovedBy])")
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PatHartmanCommented:
If you are still having syntax issues, create a string variable and populate it outside the DLookup().  That way you can look at it directly and see that the quotes are where they should be.

Dim strWhere as String
strWhere = "[Station] = " & [Forms]![Station Replenishment]![Station] & " And [Solution] =  '" & [Forms]![Station Replenishment]![cmbSolution]  & "' And [RemovedBy] Is Null"
DLookup("LotNumber","CM_SOLUTION_USAGE", strWhere)

Also, if you are running the code within the form [Station Replenishment], you can shorten the expression by using the Me. reference which also makes it easier to read.

strWhere = "[Station] = " & Me.Station & " And [Solution] =  '" & Me.cmbSolution  & "' And [RemovedBy] Is Null"
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