If you have a problem building CLX (you see "unknown event" messages) I'd suggest grabbing a new binary from: http://sayre.sysc.pdx.edu:8001/clisp/binaries/ There are new binaries for sun4c/SunOS413, sun4M/Solaris2.4, mips/Irix5 and Linux (a.out and ELF). If this fixes the problem, or especially if the problem persists, please let me know.