Why Error?

[toml_12953]

(05-19-2021 03:29 AM)Tim Wessman Wrote:  You are using an app variable. (specifically a graphing one)

Since you are not in a graphing application it cannot find it.

In the varible menu, click CTLG and see how many apps have Xmin as a varialbe. I assume you aree not trying to overite whatver user app is open?

I thought Xmin, Xmax, Ymin and Ymax were built-in variables that let me define my own screen coordinates.
Since they're not, how would I set the screen limits to plot points in a regular HPPL program? and why does the same program work on the physical calculator when both the virtual and physical calculators have no other user-defined programs or functions?