Hello, Thank you for contacting National Instruments.
I understand that you're experiencing issues when trying to build a LabVIEW dll. Fortunately, there is more information regarding this problem within our online knowledge base. See the following link. http://digital.ni.com/public.nsf/websearch/0DFFE3BA861E689686256CAA006BA7F1?OpenDocument I hope this helps. Please don't hesitate to notify me if you need further assistance. Have a great day! Kind Regards, Joe Des Rosier National Instruments