Hi Ludovic, > > It is perfectly fine, on the opposite side, to ask advanced scheme users (who > > would want to, but I really don't see the point) configure guile s the repl and > > the exception printer so it tries to print the full content of huge lsts, > > vectors, arrays ... > Perhaps you could arrange to set the REPL’s ‘print’ option right from > one of the Guile-OpenCV modules? I mean the configuration you mention > have doesn’t have to be done manually by users. I'll do that yes, since I failed to convince you it you be a better default for all of us, not just Guile-CV :) I hope I can also do that wrt exceptions in an easy way too, I did not look with care to what you suggested, since I thought what Daniel offered was a better approach and that it would be included one way or another in 2.2.4 ... let's see what I can cook with set-exception-printer! then :) Thanks, David Note that, for info, I named the project Guile-CV, not to refer to existing libs, and currently, it does not use Open-CV :) - which doesn't have a maintained C wrapper :(, but it would be nice to be able to use it 'from Guile-CV', ... one day maybe ...