sdtag:
I am having a heck of a time trying to scroll text.
I keep getting this error message:
exit status 1
'prog_uchar' does not name a typeand the sketch won't load.
What am I doing wrong?
You aren't doing anything wrong, per se. It's just an old code you're copying and Arduino IDE changed how to handle progmem stuff.
I played with this some time back but I think just adding
typedef const char prog_uchar;
somewhere before your setup/loop should fix it.