Achim, I have a new release of clisp ready to go (x86_64 only) [*]. If I remember correctly, this means you will need to rebuild maxima. The new release is available at http://sanibeltranquility.com/cygwin/ I won't upload it until I get the OK from you. Ken [*] The gcc bug that was preventing me from building several modules has disappeared as of gcc 5.3.0.