I found the answer to my own question. I replaced it with the following:

If .PivotFields(ls_measures(ln_measure, 2)).IsCalculated Then
.PivotFields(ls_measures(ln_measure, 2)).Delete
.CalculatedFields.Add ls_measures(ln_measure, 2),
ls_measures(ln_measure, 4), True
Else
.PivotFields(ls_measures(ln_measure, 0)).Orientation = xlHidden
End If

If you have a data field based on a calculated field, you can check the
"IsCalculated" Property. If it's true, I delete the base calculation, which
removes the data field (without errors, I might add). I then created another
array element that has the calculation. Based on that information, I
recreate the calculation field. This spreadsheet is now *totally* automated.

"Sam Tyler" wrote:

Here's the line:

.Pivotfields(ls_measures(ln_measure, 0)).Orientation = xlHidden

With block is set to ActiveChart.PivotLayout.PivotTable.

ls_measures is a string array (0 to 5, 0 to 3). (x, 0) contains the
caption; (x, 1) contains the data field function; (x, 2) contains the
pivottable field name; (x, 3) contains the number format.

It fails on ls_measures(5, 0), a caclulated field (run time error '1004';
unable to set the orientation property of the pivotfield class). I'm current
on SPs and updates.