Why do I lose legend labels when updating chart data?

[Guest]

Each week I update my charts by adding a column to the source data and then
updating, or extending, the chart to include the new week. One of my charts
has a problem in that when I do the update, the legend labels revert to
"Series 1, Series 2," etc. Is there a setting I can use to stop that from
happening? I have other charts that don't exhibit this behavior. Thank you.

 

[Andy Pope]

Hi,

The default Series 1, Series 2 etc are used when no information is supplied
for the series name.
Are you including a row or column that contains series name when you adjust
the source data?

Cheers
Andy