[Excel 2010] Run-time error 1004 at ".Chart.Paste" command

Hi all,

My employer is planning to move to Windows 7 and Office 2010 as existing computers come up for replacement. I have a program (developed by someone else who has since left the organisation) which runs fine on our outgoing Windows XP / Excel 2003 platform but which is crashing at a couple of points during testing on my own Windows 7 / Excel 2010 laptop at home. It previously worked fine on a Windows 7 / Excel 2007 combination.

The first, more critical probem occurs in a section of code which takes charts held within worksheets, exports them as Bitmap files and then displays them within a UserForm. In W7/E2010 I get "Run-time error '1004': Application-defined or object-defined error" at the .Chart.Paste line (I've posted the whole procedure for context).

Code:

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Sub TableShow(sheet, range, specialType, fileName, formName, imgName)

    Call Version

'  Variables for chart & file name
    Dim currentRange As range
    Dim fName As String
    Dim myCell As range

'  Variable is set to chart within 'Data' worksheet
    Set currentRange = Sheets(sheet).range(range).SpecialCells(specialType)
    x = currentRange.Width
    y = currentRange.Height

'  Save chart as GIF or BMP into temp directory
    fName = ThisWorkbook.path & "\" & fileName & "ForDeletion." & filter
   
'  chart as transition and use .ClearContents
    currentRange.CopyPicture xlScreen, xlPicture
    With currentRange.Worksheet.ChartObjects.Add(0, 0, x, y)
    .Height = y
    .Width = x
    .Chart.Paste
    .Chart.Export fileName:=fName, FilterName:=filter
    .Delete
    End With
   
'  Insert chart into image control on form
    imgName.Visible = True
    imgName.Width = x
    imgName.Height = y
    imgName.Picture = LoadPicture(fName)
    formName.Width = x + 60
   
End Sub

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I'd be hugely grateful for any help or pointers! :confused:

Cheers,
John