Hi, It seems at the moment (version 1.0.2) if I specify some files that are not present I get an error in (read-files). Python's docs at http://docs.python.org/lib/RawConfigParser-objects.html state that "If a file named in filenames cannot be opened, that file will be ignored", which actually is very useful behavior. So, maybe I'll be possible to make a change in this, something like: diff -u -r py-configparser-1.0.2-orig/parser.lisp py-configparser-1.0.2/parser.lisp --- py-configparser-1.0.2-orig/parser.lisp 2008-03-16 01:05:40.000000000 +0200 +++ py-configparser-1.0.2/parser.lisp 2008-06-03 15:53:01.406250000 +0300 @@ -190,7 +190,7 @@ Returns as values the configuration and the list of files actually read." (let (files-read) - (dolist (filename (mapcar #'probe-file filenames) + (dolist (filename (remove-if-not #'probe-file filenames) (values config files-read)) (with-open-file (s filename :direction :input Thank you, Ury