The latest ASDF doesn't work well on Windows Vista/7 and Lispworks. LispWorks regards pathnames such as #P"C:/a-dir//anotherdir" as illegal because of the double slashes in it.

I could fix it but it's a really ugly kludge not worth sharing. Anyway, I could understand where the problem lies: asdf is creating pathnames where (pathname-directory some-path) contains empty strings. This happens for output fasl files, that ASDF is placing in

%APPDATA%\common-lisp\<implementation-name>\C\\path\to\source\file

- note the double \\ after the drive letter.

Does it work better if you redefine component-name-to-pathname-components this way? (defun component-name-to-pathname-components (s &optional force-directory) "Splits the path string S, returning three values: A flag that is either :absolute or :relative, indicating how the rest of the values are to be interpreted. A directory path --- a list of strings, suitable for use with MAKE-PATHNAME when prepended with the flag value. A filename with type extension, possibly NIL in the case of a directory pathname. FORCE-DIRECTORY forces S to be interpreted as a directory pathname \(third return value will be NIL, final component of S will be treated as part of the directory path. The intention of this function is to support structured component names, e.g., \(:file \"foo/bar\"\), which will be unpacked to relative pathnames." (check-type s string) (let* ((components (split-string s :separator "/")) (last-comp (car (last components)))) (multiple-value-bind (relative components) (if (equal (first components) "") (if (equal (first-char s) #\/) (values :absolute (cdr components)) (values :relative nil)) (values :relative components)) (setf components (remove "" components :test #'equal)) (cond ((equal last-comp "") (values relative components nil)) ; "" already removed (force-directory (values relative components nil)) (t (values relative (butlast components) last-comp)))))) [ François-René ÐVB Rideau | Reflection&Cybernethics | http://fare.tunes.org ] A nazi deathcamp survivor defined truth as follows: believing it does not increase your chance of dying.