Exception while loading msg file in MapiMessage

When i m trying to load msg file in MapiMessage then i m getting following exception. Can u please explain why this exception is coming?

at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream…ctor(String path, FileMode mode, FileAccess access, FileShare share)
at ?..Load(String )
at ?.…ctor(String )
at Aspose.Email.Outlook.MapiMessageReader…ctor(String path)
at Aspose.Email.Outlook.MapiMessage.FromFile(String path)

Hi Pooja,

Thank you for writing to Aspose support team.

Please provide us the message files that give rise to the exception while loading. We’ll look into these for further investigation at our end and assist you accordingly.