AutoCAD Inventor :: Exporting PDF - HasSaveCopyAsOptions Returns False

I have a VB.NET routine that exports a pdf using the TranslatorAddIn interface.  I copied the example from the api help.

The pdf is created, but only the first sheet of the drawing is exported.  I uncommented the following line in the example code, and still no change:

oOptions.Value("Sheet_Range") = kPrintAllSheets

I added a message box, to make sure I was reaching that line, and I found that I was not in fact reaching that line.  Why is this?  In some posts here related to dwf exporting also using the TranslatorAddIn, the first argument of HasSaveCopyAsOptions was oDataMedium instead of oDocument, so I tried that, too, but still no change.

Here is the code of the export to PDF routine from the api example:

Public Sub PublishPDF() ' Get the PDF translator Add-In. Dim PDFAddIn As TranslatorAddIn Set PDFAddIn = ThisApplication.ApplicationAddIns.ItemById("{0AC6FD96-2F4D-42CE-8BE0-8AEA580399E4}") 'Set a reference to the active document (the document to be published). Dim oDocument As Document
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