[Gretl-users] no chart

Hi, could anybody tell me why none of these time series can be plotted as a chart? I double-click on a series, then I use the icon for chart. Thanks and kind regards, Thorsten Prof. Dr. Thorsten Wingenroth Professor für Lehraufgaben BWL-Bank Fakultät Wirtschaft | Studienzentrum Finanzwirtschaft (Center of Finance) Duale Hochschule Baden-Württemberg Stuttgart Baden-Wuerttemberg Cooperative State University Stuttgart Herdweg 18 | 70174 Stuttgart Fon +49 711 1849-766 thorsten.wingenroth@dhbw-stuttgart.de<mailto:thorsten.wingenroth@dhbw-stuttgart.de> | http://www.dhbw-stuttgart.de/bank Master in Business Management - Banking & Finance http://www.dhbw.de/master-finance