Question to solve a "invalid error name", into a expression formula

Grasshopper
1

Dear community, I have a litte problem with a formula into a Expression.

I can’t understand what the error may come from:

Expression
Expression1780×445 27.5 KB

Expression.gh (74.9 KB)

Greetings

2

Here something working. Not sure where it was wrong as there were many errors. I change brackets to parenthesis as it seems there are used for unitize expression. The multiplication was an X. You also inputted string so it is better to explicitely convert to double. So you can see if there are errors.

image
image1202×229 19.3 KB

Expression_LD.gh (77.8 KB)

3

Thanks for the help Laurent.