Access pass-through query giving error

Question

I'm using the following code to run a passthrough query. I'm trying to run the passthrough query, then check how many records are returned to figure out if it worked. But I get an error saying

"Invalid Operation"

Why is it doing this and how can I correct?

  Dim Item As String
  Item = InputBox("Enter Item needing a surrogate UPC.", "Enter Item")


Set db = CurrentDb

Set qdf = db.QueryDefs("spAL_AssignSurrogateUPC")
qdf.ReturnsRecords = True
qdf.SQL = "spAL_AssignSurrogateUPC '" & Item & "'"
With qdf.OpenRecordset(dbOpenSnapshot)       '<--- Error triggered here.
    If qdf.RecordCount = 1 Then
        MsgBox "Surrogate UPC assigned."
    Else
        MsgBox "ERROR.  Could not assign surrogate UPC."
    End If
End With

Answer 1

Use the EXEC syntax

qdf.SQL = "EXEC spAL_AssignSurrogateUPC '" & Replace(Item, "'", "''") & "';" 

(I assume it's SQL Server.)

I also added a replace function in order to cope with single quotes in the Item string. This also helps prevent SQL injections.

---

EDIT:

Try to do this, instead of using the With-statement

Dim rs as DAO.Recordset

...

Set rs = qdf.OpenRecordset(dbOpenSnapshot)
If rs.EOF Then
    MsgBox "ERROR.  Could not assign surrogate UPC."
Else
    MsgBox "Surrogate UPC assigned."
End If