there is a problem with the .dat file retrieve logic for the web pages. sometimes it returns the entire atricle with html and everything and not the .dat file. (25 years ago, 16-May-99, to lugnet.admin.general)
it happens both when you click on the dat lino in the group window and if you go into the article and click on open as .dat file. the technic connector with axlehole part had this problem for me. (25 years ago, 16-May-99, to lugnet.admin.general)
