Excel COM Chart.Export throws COMException

Hi there,

I am trying to export a chart using the Excel11 object from within C#.  I can
properly open workbooks and read cells, but calling Export() on the Chart
object throws the following COMException

Exception: System.Runtime.InteropServices.COMException (0x800A03EC):
Exception from HRESULT: 0x800A03EC.
at Excel._Chart.Export(String Filename, Object FilterName, Object
Interactive)
at MBCCS.LeParc.Importer.Importer.GetImageInfoFromWorksheet(Worksheet
worksheet) in d:\source\leparc\importer\importer.cs:line 211

The line causing this is:

tempChart.Chart.Export(filename, "JPEG", Missing.Value);

The JPEG filter is registered.

I am trying to export a picture from excel to an external file.  What I am doing is creating a new
chart, copying the picture to the chart, then exporting the chart.  The
Excel process is running under the ASPNET account.

Any help would be greatly appreciated.

Thanks,
sberkovitzAsked:
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sberkovitzAuthor Commented:
OK Figured it out.

The problem was that the ASPNET user account didn't have access to the MSI Installer COM object.  What was happening is that the .Export() method searches the HKCU registry key for available graphic filters.  Because the ASPNET user is not an interactive user, no user profile had been created for it, and calling the .Export() method prompted MSI to create the profile (including the HKCU hive).
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