There could be several things missing. At the end of the build, you get a message to "Remember that the LabVIEW Run-Time Engine Version" [name your version] must be installed on any machine that is going to run this application." Did you do this by creating an installer with the engine included? Do you require NI Reports, 3D Graph, Datasocket, VISA, NI-DAQ, Vision? All of these require that you create an installer with them or install them separately.