Index out of Range Extracting from PST

The attached program will open a PST and extract the emails.  When two of the four emails are extracted, an Index out of range exception is thrown.  If the PST is opened through Outlook, the emails may be viewed correctly.  The test program takes three parameters:

The PST file name -- included

The folder name -- BackupBox\

The output folder

I am using Visual Studio 2013 and Aspose.Email version 4.2.

Thank you,

Jeff