excel - VBA Runtime 91 Error

Question

Trying to automate a lengthy data entry process in excel.

For some reason the second time I try to find a value in a given range I get a run time 91 error. I can't figure out why this is happening. If I change the range from "AF3:AF30" to the first time I set a range("B2:AD2"), the program will continue through the line with no problem. But for some reason any range other than the first "B2:AD2" will give runtime!

Code:

Sub AutoFill()
Range("B8:AD57").Select
Selection.ClearContents
Range("B8").Select

Dim Rng As Range, cell As Range

Set Rng = Worksheets("Avon Trailer List").Range("E4:E38")

For Each cell In Rng
    Dim temp As String

    temp = Replace(cell.Value(), " ", "")
    temp = Replace(temp, "+", "")
    If temp = "" Then
        Exit For
    Else
        col = ""
        tempa = SplitMultiDelims(temp, "/,)(")
        For i = 0 To UBound(tempa)
            If InStr(tempa(i), "A") = 1 Then
                strInput = Worksheets("Pallet Check").Range("B2:AD2").Find(tempa(i)).Address()
                lnRow = Range(strInput).Row
                strCol = Left(strInput, Len(strInput) - Len(CStr(lnRow)))
                strCol = Replace(strCol, "S", "")
                Search = tempa(i)
            ElseIf InStr(tempa(i), "A") > 1 Or InStr(tempa(i), "B") > 1 Or InStr(tempa(i), "a") > 1 Or InStr(tempa(i), "b") > 1 Then
                strInput = Worksheets("Pallet Check").Range("AF3:AF30").Find(Search).Address()
                lnRow = Range(strInput).Row
                Range("AH" & lnRow).Value() = "(" & tempa(i) & ")"
            ElseIf tempa(i) <> "" Then
                Worksheets("Pallet Check").Range(strCol & tempa(i) + 7).Value() = Worksheets("Pallet Check").Range(strCol & tempa(i) + 7).Value() & tempa(i)
            End If
        Next i
    End If
Next cell
End Sub

Runtime Error 91 happens on the following line of code:

strInput = Worksheets("Pallet Check").Range("AF3:AF30").Find(Search).Address()

Answer 1

Find().Address breaks with exception (code 91) if not found. This is because .Find() returns a range that actually points to one specific cell OR returns Nothing when not found and 'Nothing'.Address is meaningless (n.b.: null value for objects in VBA is 'Nothing'). So I would replace that line with

 Fnd = Worksheets("Pallet Check").Range("AF3:AF30").Find(Search)
 if Not Fnd Is Nothing then
     strInput = Fnd.Address
     ...