Perhaps you aren't allowed to use Y1 as a second argument to an operation. Maybe Y1+A instead?

Hmm.

Will we see an update tonight?

I have no idea, I've had so much trouble with it because the emulators don't pick it up and its usually either extremely rare or extremely hardware specific and there appears to be no pattern with any of it.  It all comes down to me guessing what the problem could be and then hoping I fixed it somehow.  I am going to try another strategy soon...

Quick question: can files like Y₀-Y₉ be reused in a program?

Can Axe write to external variables?  In the documentation it shows how to read them, but not write to them.

Thanks! That almost exactly what I was trying (even the same string for Str2), but I didn't have the "->A" part at the end of GetCalc.  Why can't I just use Str1 as the pointer?

Because when you initilize Str like this:

"Str1"->Str1

Its not initialized as a pointer to the Basic variable Str1, its initialized as a String that you can use in your program, that contains the text "Str1".  GetCalc parses the String, and returns a pointer that actually points to the file/variable that is inside the string.

for the first question, no you will need to use Fill() or Copy() to do so (if you want it to be all zeros, fill is what you want).  Personally I haven't used fill(), so I can't help you there