I have a report using a chart, based on a query. Sometimes when I print the report the chart displays old data, ie the chart is not rerunning the query. The old data is the data that existed when the chart was created, and has since been deleted.

Is there any way to force the chart to update?

Make sure that the master/child links for the chart control are properly set so that the report will sync the chart. Also, on fast computers, you sometimes have to slow down the process a little by forcing a requery in the Format event of the section that contains the chart object.

Me.YourChartName.Requery