I am experiencing an error in a subroutine attempting to set the plotarea.width property of a chart.

The other dimensions also cause this error if I comment out the preceding line(s). There is no ActiveChart, no selection, etc. The specific error message is this: "-2147467259 (80004005) Method 'Width' of object 'PlotArea' failed"
This is stumping me for several reasons:
- In debug mode, F8 to step through the code the error does NOT occur.
- AFAIK "width" is not a "method" but a "property" of the chart's plotarea, so even the error message is rather ambiguous.
Any thoughts? Here's as much code as I can share, the ChartSizeMedium subroutine in its entirety, and a dummy snippet to show you how I am establishing the chart and passing it to that sub which sets the size & some other properties prior to passing to another function which adds the series data to the chart.
Option Explicit
Private Sub EstablishChartObject()
Dim cObj as ChartObject
Set cObj = ActiveSheet.ChartObjects.Add(Left:=30, Top:30, Width:=740, Height:=300)
ChartSizeMedium cObj.Chart, "Integer", "Example Chart Title"
End Sub
Private Sub ChartSizeMedium(cht As Chart, NumType As String, Optional chtTitle As String)
'Subroutine to make a consistent size chart
Dim s As Long
With cht
'Add a chart title if one exists.
If Len(chtTitle) > 0 Then
.HasTitle = True
.chartTitle.Characters.Text = chtTitle
End If
'Create the default chart Legend
.HasLegend = True
With .Legend
.Position = xlTop
.Font.Size = 11
.Font.Bold = True
End With
'Format the axes
.Axes(xlValue).MajorGridlines.Format.Line.Visible = msoFalse
.Axes(xlValue).MinorGridlines.Format.Line.Visible = msoFalse
'Format the size of the chart
With .Parent
.Width = 740
.Height = 396
End With
With .PlotArea
.Width = 640 '<---- THIS LINE TRIGGERS THE ERROR
.Height = 280
.Left = 30
.Top = 30
End With
End With
'Some charts start with more than one series container, so make sure they're gone:
With cht
Do Until .SeriesCollection.Count = 0
s = .SeriesCollection.Count
.SeriesCollection(s).Delete
Loop
End With
End Sub
UPDATE Dec 12, 2012
I remove all non-problematic code and use only the PlotArea with block, in the same routine, I have also tried setting the chart type (several values) and as shown in this example, manually adding one series of data prior to attempting to set the PlotArea dimensions, but the error persists:
Option Explicit
Private Sub EstablishChartObject2()
Dim cObj As ChartObject
Dim sh As Worksheet
Set sh = ActiveSheet
Dim srs As Series
Set cObj = sh.ChartObjects.Add(Left:=30, Top:=30, Width:=740, Height:=300)
Set srs = cObj.Chart.SeriesCollection.NewSeries
srs.Values = "={1,3,5,7,4}"
cObj.Chart.ChartType = 57
With cObj.Chart.PlotArea
.Width = 100 '<---- THIS LINE TRIGGERS THE ERROR
.Height = 280
.Left = 30
.Top = 30
End With
End Sub

Debug.Print cObj.Chart.PlotArea.Widthreturns a plotarea.width of 718. - David ZemensScreenUpdatingback on: vbaexpress.com/forum/archive/index.php/t-17251.html. Don't know if that applies to you. - Doug Glancywidthline to see if error jumps any other line? - bonCodigo