Hello Mike thanks for you quick response. > > When I try to install tdm it complaines that "tdm requieres libr0 which > > is not an install candidate" so the dependensies could not be resolved. > > What to do next? > Do you have builddeps configured in your sources.list? No, I hadn'd. I give it a next try witn the builddeps enabled (I really didn't understand what the repo is good for - exept I have a longer time to wait) and now trinity was not deinstalled - but some other packages - for example gimp, freecad... So many thanks for your help Rolf