When viewing a pie chart view for a device in DX Netops Performance Management shows "No Data To Display (Invalid Data)"
All DX NetOps Performance Management releases
All the data the pie chart is based on is comprised of zero values (as in valid values, but they are all 0).
Pie charts will show "No Data To Display (Invalid Data) when all the data the Pie Chart is based on are zero values.
You can verify this by configuring a table or trend view for the same device/metrics to see the values.