How do I configure the Gantt chart so it displays calendar axis

Has anybody used the two types of Gantt charts available in the Report Designer?

I have tried to use the chart wizard but don’t understand how to show a calendar axis. When I tried changing the scale type from quantity to datatime a small red circle with a white cross appears next the the dropdown.

Is there a step-by-step guide or an example gantt chart somewhere?

I’m must be missing something or need to have my datetime fields (start and finish dates) in a particular format.

Any help you can offer would be welcome.

Thank you in advance.

David

Bump…