In Libs/Compressors directory you can found the assembler version of the following libraries: xpkENCO.library, xpkRLEN.library. They are shorter and faster than the C versions spread with the XPK package. And they are a little different: ENCO - fails if the given password can't encrypt a file, e.g. 'ee' or 'puda' RLEN - packs with a little better efficiency Enjoy Adam Ciarcinski adam@felix.univ.szczecin.pl ciarcins@beta.seatech.tuniv.szczecin.pl