I like Evince to read pdf documents on CentOS 5 , but i wanted also to use the Adobe Reader to do it ... but each time i wanted to launch it, i had a "expr: syntax error" error while launching the /usr/bin/acroread script. Solution is to edit this file and remove a check : check_gtk_ver_and_set_lib_path "\$MIN_GTK_VERSION" . After that, it works ok ...