Cannot view underyling data when pie chart shows 100%

Cannot view underyling data when pie chart shows 100%

I have built a report which displays a pie chart, with a drill down to lower levels (product range -> design -> customer type).

In some circumstances, drill down on a segment of the pie chart gives you a new pie chart with only one segment i.e. 100%. If you hover over this segment, you get the usual floating dialoge which shows the segment value and the text 'Click to see the data' - however, clicking does nothing - no underlying data is displayed.

Everything works fine if there is more than one segment to the pie chart - it only has a problem if the segment is 100%

Any ideas?