I've done a fresh installation on my wife's Windows 11 laptop. So far, everything seems to run as it should (except for F keys which are presumably set to Windows things). I did have to get past Windows and the security software not wanting me to run the installation program, but hacked round this.
So far I've tested with modify speed, followed by repitch transpose (to test spectral auto-conversion).
Because of the vast number of CDP processes, Soundshaper reads parameter data from a text file CmdData.txt which must reside in its \BAT sub-folder. Any issue with reading the appropriate setup data from this file will give strange results and messages as you report. So that's the problem - the file is easily replaced if corrupted somehow... Can your user test first if the file is there, in the correct place? Have they installed Soundshaper/CDP from fresh or just copied files from someone, which might mean the setup is not right?
It may be necessary to correspond directly to get to the bottom of the issue. Your student is welcome to send me emails in Italian and I can use Google Translate to understand and reply. Email is found here:
http://www.ensemble-software.net/links.htmlRobert F.