Hi Luke
Enclosing the file. What I am trying to do is a thermometer representation of a data point. I did see this on this website. I did try on a line graph, like you have shown. It works fine. thanks.
There is some confusion over what constitutes a series ; your file had all the points in one series. Only if you separate them into 3 series can you have only one error bar. At least that is what I think.