In iX 1.31 the user saved the Trend Chart data for later use by selecting the "History" check box. In iX 2.0 if you want to save the Trend Chart data for later viewing you need to assign a "Logger Item". That way all data logged for later use will go through a Datalogger.
When you open up a 1.31 project in iX 2.0 that includes a Trend Chart with the "History" check box checked, it does not know what Datalogger you want to use to save the data with. It defaults to not saving the Trend Chart data for later use. If you want to have the Trend Chart save data for later use, you need to select a Datalogger to use to save the data through.
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