The view definition of the graph might have got corrupted. Republish the graph to resolve the issue. After republishing the graph, you can configure it on a dashboard portlet. In case if the problem persists, please contact the support team.
The maximum number of records that each of the graph/chart can hold are listed below: Max Record Size = 1000 for: -------------------------------------- Area Chart Line Chart Stacked Bar Chart Vertical Bar Chart Bar Chart 3D Bar Chart Radar Chart ...