You should note that a USR global which only has Get and Set operations on a single piece of data isn't really any better than a global variable. All its advantages (including the memory allocation issue) only exist if all the operations are done inside the VI. You should also note that the memory allocation issue is usually only an issue if you have either large arrays, limited memory or many copies. Assuming your arrays are 1D DBL, that's not a lot over 1 MB for each array. With today's RAM, that's not usually a problem.
___________________
Try to take over the world!
