That var won't become avail for mapping until you've selected a destination var of a compatible datatype if I'm not mistaken. If you highlight cFirstTimeFlag on the lower right you should see your cFiscalDatePattern variable in the list.
I think this is what you are looking for, if I've oversimplified and been presumptuous on this suggestion I apologize in advance!
I wouldn't have mentioned it if I hadn't done the same thing myself countless times Not a moron!That allowed the variable to show up in the mapping tab. Sometimes, I feel like such a moron!
I changed the NER back to using the variable on the subform instead of the SI, but it didn't seem to make much difference. The second subform (referenced in screenshot) is still not using the value in that form variable. In addition, the debugger now shows no value in that variable, even when executing on the first subform, whereas before it showed that it was populated. I'm very tenacious, but I must confess that I am about ready to declare defeat on this one.