Hi,

I have a question, this exact error has been posted before and is even solved. But I have not managed to get it working anyway. Earlier post: Error - .pyUI.pyChart: You must select an Aggregate Column for the chart Data Axis | Support Center (pega.com)

I have a chart with:

- Opportunity amount on the Y-axis: which uses the sum function

- Opportunity Stage on the X-asis.

Goal is to display the total amount per stage. Chart is displayed as required. But upon saving i get the error. The answer in the solved post mentioned to use a aggregate column in the chart axis. But the amount on the Y-axis is the aggregate column and still it does not work. 

Anyone any additional insights?