I am very new to expressions so excuse me if this question is stupid.
Recently, I was watching a tutorial and tried to go along but although I copied the code line by line there was an error message every time I tried. (see below for expression)
Luckily there was also a prepared project file that contained the expression which is 100% identical with the one I wrote myself.
The only difference is that it works, even when I copy it to other projects.
Since I really want to learn more about expressions my question is: Why doesn't the expression I wrote work even though it is completely identical to the one I got from the project file and what does the error message mean.
Last time i saw this kind of error was because the expression was written in french and the minus was actually a dialogue line. So if you don't use english keyboard, some sign there may be something else than you think. If you copy paste your expression here and the other one, i could investigate to see which one.