Why doesn't this work:

For Each wb In Workbooks
'Test to see if wb's name is like "*C&A PF*.xlsm"
If wb.Name Like "*C&A PF*.xlsm" Then
With wb
CDLastRow = .Sheets("Catalyst Dump").Range("A" & Rows.Count) _
& .End(xlUp).Row
.Worksheets("Catalyst Dump").Columns("D").ColumnWidth = 18
End With
End If
Next

The line starting with CDLastRow is giving me the error. Object doesn't
support this property or method.