@klauss2008

I appreciate your tutelage, but I'd like to stick with your first suggestion.
As near as I can tell, I have exactly input your first proposed command.
If I have, there is a syntax error in it.
If I haven't then I can't see the difference.

Perhaps you can look more closely at my post #24, forget my post #25, and
see what needs to be done.
I think this might be the simplest way to proceed at this point.
I grasp your idea, but I'd like to defer 'understanding' the syntax to later.

So, is there a difference in the two lines I posted in #24?

Thanks for your patience.