Hi

I am using TeeChart Standard v7.12 Win32 and I am having the same problem. Can you tell me which version is this bug fixed in?

Cheers

Hi Narcís

I found out that as long as I set the width of the pen to 1 pixel, drawing the dotted line will not make my computer unresponsive.

Cheers

I've done it this way:
penLineEst.LinePen.Style := psDot;

When I try to move the chart (right mouse button), my application just hangs for about 30 seconds.