hi, Everytime I use idlde, idl showed the problem below : ============================================== Gtk-Message: Failed to load module "canberra-gtk-module": /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so: wrong ELF class: ELFCLASS64 /usr/lib/gio/modules/libgvfsdbus.so: wrong ELF class: ELFCLASS64 Failed to load module: /usr/lib/gio/modules/libgvfsdbus.so /usr/lib/gio/modules/libgiogconf.so: wrong ELF class: ELFCLASS64 Failed to load module: /usr/lib/gio/modules/libgiogconf.so /usr/lib/gio/modules/libgioremote-volume-monitor.so: wrong ELF class: ELFCLASS64 Failed to load module: /usr/lib/gio/modules/libgioremote-volume-monitor.so ============================================================= My system is 64-bit linux system with Ubutu, and I already install 32-bit compatibility libraries. Those "xxxxx.so" files which idlde failed to load  exist in  /usr/lib, /usr/lib32, /usr/lib64. But, everytime  "idlde" links to /usr/lib  rather than  /usr/lib32.. How can I ask idlde to link /usr/lib32 rather than /usr/lib ?? (by the way, will this solve the problem?) many thanks !!