Error 7412 using email with Lotus Notes Version 8.5

Happens with 0.9.5 and 0.9.8 and happens on all Windows versions, when using the email button to send created pdf as email through Lotus Notes 8.5. Lotus Notes 8.0 is still fine...

Need some help urgently. Any ideas?

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PDFCreator - www.pdfforge.org
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Errorprotocol
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PDFCreator 0.9.5 - Error message
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ERROR DESCRIPTION:
          Error-Nr: 7412 (Notes Error - Null object handle)
          Modul: clsPDFCreatorMail
          Procedure: SendNotesMail
          Line:      50380
          Date/Time: 09-07-2009 / 12:12:29
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CALLSTACK:
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SYSTEMINFO:
 Windows 2003 5.2 Build 3790 (Service Pack 2)
  [TerminalServer Win2003Server]
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We do have exactly the same error (7412).

We are using PDFCréator Version 1.3.2 in a citrix 4.5 environment on Windows 2003 SP2.

When one of our user got the issue, just closing the session and réopen it seems to solve the issue.

Best regards,

Gael.