MSG to PDF conversion

on certain machines MSG to PDF conversion throws the the following error :
"Could not find a part of the path ‘C:\Windows\Fonts\private\ARIALNB.TTF’ "

what could be causing this error?, Fonts are installed on the machines under C:\Windows\Fonts, but the library is looking into the folder C:\Windows\Fonts\private\

Here is the code snippet
using (MailMessage mailMsg = MailMessage.Load(InputFileName))
{

                using (MemoryStream ms = new MemoryStream())
                {

                    //Save as MHTML
                    mailMsg.Save(ms, MsgSaveOptions.DefaultMhtml);

                    //create an instance of LoadOptions and set the LoadFormat to Mhtml
                    var loadOptions = new Aspose.Words.LoadOptions();
                    loadOptions.LoadFormat = Aspose.Words.LoadFormat.Mhtml;

                    //create an instance of Document and load the MTHML from MemoryStream
                    var document = new Aspose.Words.Document(ms, loadOptions);
                    

                    //create an instance of HtmlSaveOptions and set the SaveFormat to Html
                    var saveOptions = new Aspose.Words.Saving.PdfSaveOptions()
                    {
                        MemoryOptimization = true,
                        SaveFormat = SaveFormat.Pdf
                    };

                    //save the document to Html file
                    document.Save(OutputFileName, saveOptions);
                }
            }

This topic has been moved to the related forum: MSG to PDF conversion - Free Support Forum - aspose.com