Hello Ken,
I understand your frustration with this, the Application Builder can be difficult. A few things I would double-check are:
1) Make sure that all VIs that are being called dynamically are included when building the application.
2) Make sure that the DLLs called by the dynamically called VI are present on the run-time system.
Basically, if an application calls a VI dynamically that was not included in the
build, and the dynamically called VI calls a dll that is not included
on run-time system, Error 1124 will occur. I am assuming the error you receive stating the VI is not loadable is associated with error code 1124, correct?
Let me know if you have further questions. Cheers!
-Bob