Anyone know why one script would work like this:

source refplanes.mel;
refplanes;

but not work when saving all of the code to shelf, and another script would work by saving the code to shelf but not by saving the command name to shelf? Why would they be opposite and how can I make the latter of these work by just saving the command name to the shelf?

See example above. The xray.mel script gives me an error when trying to use the command name (script name?).