Why does my HP48G program give this error??

[DM48]

(10-28-2023 04:42 PM)Nigel (UK) Wrote:  In one place you have \(\sqrt{H/2-y^2}\); I guess the \(H/2\) should be squared.

Nigel (UK)

Nigel, I want to thank you from the bottom of my heart. I have typed this equation in no less than fifty times between yesterday and today and every time I must have left that out. I have checked, rechecked, and checked again. Deleted, swapped phones, used a real 48G, etc.

It is now working. Thank you!