or download this
if (defined($value_type) and length($value_type) and ($value_type
+eq 'ARRAY'
or ((ref($value) !~ /^(CODE)|(HASH)|(SCALAR)$/) and $value->isa('ARRA
+Y')))) {
(ref($param_map->{$param}) eq 'HTML::Template::LOOP') or
croak("HTML::Template::param() : attempt to set parameter '$pa
+ram' with
an array ref - parameter is not a TMPL_LOOP!");