Hi Karim,
I have begun to erase all xfasl files, now I am loading OM with only my library, Situation and Alea preloaded. But the problem is always here. Besides I have had some errors relative to xfals in OMChroma, even if I was not autoloading it. I have deleted also all OMChroma xfals files, but there is the same problem, relative to Situation auto-loading process (downloaded again, so it is a fresh install).
I supposed it could be because my library require Alea and Situation, so I commented the code in my FDSDB_XXth_CT.lisp file, but nothing change: to be concise, if I preload more than a library, I encounter this problem.
Now I can try to delete all xfals files of all libraries I autoload on start, but I think it will not resolve.
Meanwhile thank you for support, perhaps it is a problem of old El Capitan OsX version, but if possible I would avoid to update…
Ciao
Fabio