I am a new user of clearsilver and I am trying some features of it.

when testing the build-in escape functions such as url_escape and html_escape, some error prompted:

 File "csparse.c", line 709, in cs_parse_string()

                                 File "csparse.c", line 1635, in var_parse()

        File "csparse.c", line 1459, in parse_expr()

                                                      File "csparse.c", line 1413, in parse_expr2()

                             ParseError: [lineno:~31] Unknown function url_escape called

And here is my cs string :

<?cs set:form="<form method='post' action='http://localhost:4002/atompub/form/13412' >" ?>

<?cs var:url_escape(form) ?>

Anyone can help?

thanks.