Message error : UnnamedSelector

[franck LAMY]

Hi,   i'm new with cocoon. I try to execute the "traditional" hello world. When i type the following URL " http://localhost:8080/cocoonCfort/hello.html" i have the following error message Message: UnnamedSelector: ComponentSelector Attempted to retrieve component with null hint. Description: org.apache.avalon.framework.component.ComponentException: UnnamedSelector: ComponentSelector Attempted to retrieve component with null hint. Sender: org.apache.cocoon.servlet.CocoonServlet Source: Cocoon Servlet Request URI hello.html cause org.apache.avalon.framework.component.ComponentException: UnnamedSelector: ComponentSelector Attempted to retrieve component with null hint. request-uri /cocoonCfort/hello.html   My sitemap is as follow : <?xml version="1.0"?> <map:sitemap xmlns:map="http://apache.org/cocoon/sitemap/1.0"><!-- =========================== Views =================================== --><map:components><map:generators default="file"><map:generator name="file" label="content,data"src="" pool-max="32" pool-min="16" pool-grow="4"/></map:generators><map:transformers default="xslt"><map:transformer logger="sitemap.transformer.xslt" name="xslt" pool-grow="2" pool-max="32" pool-min="8" src=""/></map:transformers><map:serializers default="html"><map:serializer logger="sitemap.serializer.html" mime-type="text/html" name="html" pool-grow="4" pool-max="32" pool-min="4" src=""><doctype-public>-//W3C//DTD HTML 4.01 Transitional//EN</doctype-public><doctype-system>http://www.w3.org/TR/html4/loose.dtd</doctype-system></map:serializer></map:serializers><map:matchers default="wildcard"><map:matcher logger="sitemap.matcher.wildcard" name="wildcard" src=""/></map:matchers> </map:components><!-- =========================== Pipelines ================================= --><map:pipelines><map:pipeline><map:match pattern="*.html"><map:generate src=""/><map:transform src=""/><map:serialize type="html"/></map:match></map:pipeline></map:pipelines></map:sitemap> what's wrong ??? I use cocoon 2.1.4 THANKS