Print at Home Ticketing - Troubleshooting

Hi,

We're working towards having print at home.  I'm setting up a test system so that the box office can start designing the ticket.  I've run into a problem that I cannot solve:

The Tessitura ticket design (2011) that we want to use does not work.  However, another Tessitura ticket design (2079) does work.  Therefore I eliminate any misconfiguration in the .config file.  If I copy 2079 to a new design, it stops working.

Is there any other parameter, or relation, that effects ticket designs?  

The logged error message is:

12:19:33 PM ####ERROR: Order #974130 Failed-Reason:System.NullReferenceException: Object reference not set to an instance of an object.
   at Tessitura.ETicket.WindowsService.Pdf.DrawData(Ticket ticket, MergeDocument document, Int32 pageIdx, String templatePath)
   at Tessitura.ETicket.WindowsService.Pdf.GenerateTicket(Tickets tickets)
   at Tessitura.ETicket.WindowsService.Orders.PrintOrder(Tickets tickets, Int32 orderNumber, Int32 eaddress_no, String email, DateTime orderDate, Int32 customerNumber, Int32 mos, Boolean saveHardCopy, Int32 totalCount, Int32 currentCount, Hashtable htOrgSettings)
   at Tessitura.ETicket.WindowsService.Orders.Execute(String receipt, String reprint)
### INNER Exception: 7.5.6.21557 at
    at Tessitura.ETicket.WindowsService.ExceptionManagement.Manager.BuildMessage(String)
    at Tessitura.ETicket.WindowsService.ExceptionManagement.Manager.Execute(EnumerationType, String)
    at Tessitura.ETicket.WindowsService.Orders.Execute(String, String)
    at Tessitura.ETicket.WindowsService.Scheduler.StartETicket()