Thanks for your help, Jacob! I thought Framemaker was able to import Ventura files. At least in FM7, I can select the file type Ventura Publisher, and when I select a chp file, FM automatically suggest this file type. But obviously, things are more difficult than I first thought.
Also, is Ventura 10 really able to open all older Ventura file formats? I doubt this, but will try. My idea was to use Ventura (whatever version), save the existing files in a version FM understands and then import those into FM. At least, that' what some people seem to have managed. Best regards, Lutz