Hi, as Jack suggested, I started learning Hansl. I tried to implement a download from the website ariva.de which offers data on all sorts of securities (stocks, funds, etc.) traded in Germany. While the download is fine, getting the files into Gretl proved hard. The hansl file "elimThousSep.inp" contains the following line near the end: append @strFile This makes Gretl crash. It has something to do with the prior "open" command (second last line of code) because without, there is no crash. I attach the file together with an additional small include (arivaTickers.inp) and the csv file. Gretl version is 1.9.92 on a Windows PC. Thanks for your help! Thorsten 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