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SteveL13Flag for United States of America

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Error with DLookup

I am getting a #Error using a DLookup on a report..

Here is the control source for the field:

=DLookUp("[LastName]","tblEmployees","[ID] = " & [Reports]![rptOpenServiceEvents]![txtTechnician5])

How can I change this to the #Error goes away?
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SteveL13
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ASKER

By the way... LastName is text and may be null.
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It should read:

Dim lngID As Long
lngID = Nz([Reports]![rptOpenServiceEvents]![txtTechnician5], 0)
=DLookUp("[LastName]","tblEmployees","[ID] = " & lngID & "")

Of course, if rptOpenServiceEvents is not open, it will fail.

/gustav
Am getting invalid use of null with this solution.

Here is what I have which is a copy/paste in the onprint event of the detail section of the report...

    Dim lngID As Long
    lngID = Nz([Reports]![rptOpenServiceEvents]![txtTechnician5], 0) = DLookup("[LastName]", "tblEmployees", "[ID] = " & lngID & "")

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Gustav Brock
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Perfect!   Thanks again.
You are welcome!

/gustav