it has been solved it generates because i had wrote
<filter-mapping> <filter-name>sitemesh</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>struts-cleanup</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> thanks again -- View this message in context: http://www.nabble.com/error-while-try-to-write-strtuts-tags-in-decorater%27s-main-.jsp-tp15650456p15651539.html Sent from the Struts - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]