html template error

code=yes

Can't call method "param" on an undefined value at
	/home/article/Article/root/static/Page.pm line 62 (#1)
    (F) You used the syntax of a method call, but the slot filled by the
    object reference or package name contains an undefined value.  Something
    like this will reproduce the error:
    
        $BADREF = undef;
        process $BADREF 1,2,3;
        $BADREF->process(1,2,3);
    
Uncaught exception from user code:
	Can't call method "param" on an undefined value at /home/article/Article/root/static/Page.pm line 62.
 at /home/article/Article/root/static/Page.pm line 62.
&#9;Page::set_template_variable(Page=HASH(0x93e5df0), "html", "<p>para one</p>\x{a}\x{a}<p>para two</p>\x{a}\x{a}") called at ./markup2html.pl line 54