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I am trying to add attachment to a message but getting error System.Exception: 'Cannot get subnode: missing data tree root. I tried to test with various combinations of SaveChanges() on various data items but nothing worked.

`
using System.Net;
using System.Text;
using System.Xml;
using System.Xml.Linq;
using System.Text.RegularExpressions;

namespace PSTFileFormat
{
class Program
{
static void Main(string[] args)
{
PSTFile pstFile = new PSTFile(@"D:\ksemwal\Temp\PSTFiles\SimpleEmailPST2.pst");

        var topFolder = pstFile.TopOfPersonalFolders;

        pstFile.BeginSavingChanges();

        foreach (var folder in topFolder.GetChildFolders())
        {
            System.Console.WriteLine(folder.DisplayName);

            if(folder.MessageCount > 0)
            {
                MessageObject curMessage = folder.GetMessage(0);
                System.Console.WriteLine(curMessage.Subject);

                AttachmentObject attachmentObject = AttachmentObject.CreateNewExceptionAttachmentObject(pstFile, curMessage.SubnodeBTree);
                attachmentObject.SaveChanges();

                curMessage.AddAttachment(attachmentObject);
                curMessage.SaveChanges();
                folder.SaveChanges();
            }
        }

        topFolder.SaveChanges();
        pstFile.EndSavingChanges();
        pstFile.CommitChanges();
    }
}

}
`

How do i create an new PST file and Add email messages to it?

Hello,
I'm trying to use this library to make PST Backups. I want to get the new messages and send them to a PST backup folder.
So far I was able to get folders, create folders on the destination, read and insert messages on the destination, but when I open the pst destination file on the Outlook, I can't read de messages.

That's not possible to show this item on the reading panel.
Any possible solutions?
(I'm running testing under spam/trash folder! =D Don't want to break anything until all is good to run on production.)

Thanks