I've a report view which contains Graph and has been used for a few years since 2015 without problem,
however I encountered an error after upgrading to 2017 R3 saying "lineSeries1 : X value must be null or empty when using Category Style".
I searched here and there as well as report document guide but can't have a tip.
What does that mean?
Pls refer attached my report design image and let me know what should be changed.