Good Afternoon Recently downloaded your DocBook XML V4.1.2 as I want to learn more about SGML/XML but when I unarchived the files and clicked on Docbook.cat received a Box message: "Invalid Public Key Security Object File" and below another message "This is an invalid Security Catalog File". As I stated, I'm new to XML and maybe my system requirements are not up to par or I need some other software to run DocBook, if so, please advise. CPU: AMD K6 300 128k ram CDRW SoundBlaster Live ATI magnum xpert 128 Win98 1st edition (all security fixes and updates installed) I.E 5.5 Thanks, Mcasey
