That's interesting. Because SOME of the changes I've made DO NOT require saving and work just fine.
Yes, saving after EVERY change seems to have corrected my issue. I've successfully passed numerics and strings in and out. Next I'll try passing files.
My next question: Where do I locate a posting of all the "known issues" for LabView 2013? And is does this list distinguish betwen the Pro, Full, Student, etc. versions? And what about the FPGA module, FGEN module, Application builder, etc.?
I do want to say Thank You for the help.