Still not working

I'm still trying to get this Converter program to work.  I've gone all of the way through the tutorial, but when I finished it, there were several discrepancies between the actual program and the tutorial.  So, even following it exactly, the program came up with several errors.  I managed to correct the errors with the limited knowledge I have.  If errors come up in the build process then XCode won't build the program and it can't be run.  So, first I had to get no errors and then the program would build and I could actually try it.  Unfortunately, when I did run it nothing actually happened.  I'm trying to figure out why, because I really have no idea.  It says that the action convert: that I have is not connecting to its target and I'm pretty sure that it is just related to how some of the objects are labeled.  I'm just not sure exactly which labels to change and how to change them, but I'm just trying things out.  It is nice to be able to see the effect of all of the changes I make so even though the program isn't working I can see what everything does when I change it.