Found in 1.03, and it's still in 1.05: File protocol.lisp Look for the line: (funcall (the (function (stream (unsigned-byte 32)) t) (field-interpreter field)) Lispworks (5.02 Win32 in my test; but nothing win32-specific here) complains of inability to use a call signature function specifier. I.e. I think you can say (the function f) but not (the (function integer) f). I believe specifying a function to this degree is unsupported in lispworks. I could be wrong; but this stops doquery from working, and when I change the code to a "straight" function call (no "the") it works. IMHO this may warrant some #+Lispworks (If omission is inherent to LW) or #+SBCL (if this is a SBCL feature) blocks here. . . Let me know how I can be of assistance in submitting or testing code that can remove this issue from future releases. Matt