Chart link breaks overnight

uwheeler
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I display a chart in my chart that I have to re-link every day because, at some point, it becomes an error message. See below. Any help?
Answers
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Hello @uwheeler A couple of questions to better understand the structure of your dashboard chart:
Are your charting a report or a sheet?
Are you using the TODAY() function to generate data for your chart?
Happy to help if you still need input.
Pauline
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Thanks, Pauline. I am charting a sheet. Not using the TODAY() function—would that make the difference?