@Martin Gregorie Thank you for your reply: [...] Additional thought: has the installer set the execution bit(s) on executable files? [...] Yes, they are all executable for everyone. Reinstalled the software to the "programs" and root of C: No success. All 'important' filenames are 8.3 (readme's, manuals etc. are longer.) Even switched to all capital letters (thanks 'rename') without success. Checked on my old windows pc, the filenames on windows, like in wine all are lower case (tbxyxy.exe) and written identically. Is there a program like "windows-filemon" for linux/wine where you can check wich files are being tried to open in the background? @vitamin [...] Then this program is broken by design. [...] I know, but the market for learning software for sign language is quite thin, I fear... Software for deaf/mute people without sound and yet the requirements says you need a soundcard. Not able to use spaces in folder names and the default folder for the software contains one... Well they offer a new version 3.0 (mine is 2.1), I think I will ask them if those strange requirements are still valid. And if they are, I can still copy the 8.3 avi-files to harddisk,rename them, have a script open them randomly and have a vocabulary-test. Regards, Chris