Struts 2 error for using Freemarker

[James.HD Li]

Hi guys,

I'm a new guy to struts 2. I'm following the get in the door examples and encountering an error while using struts tags. The error is as below:

Expression parameters.templateDir is undefined on line 23, column 15 in template/xhtml/text.ftl.
The problematic instruction:
----------
==> ${parameters.templateDir} [on line 23, column 13 in template/xhtml/text.ftl]
 in include "/${parameters.templateDir}/${parameters.theme}/controlheader.ftl" [on line 23, column 1 in template/xhtml/text.ftl]
----------

Java backtrace for programmers:
----------
freemarker.core.InvalidReferenceException: Expression parameters.templateDir is undefined on line 23, column 15 in template/xhtml/text.ftl.
	at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
	at freemarker.core.Expression.getStringValue(Expression.java:118)
	at freemarker.core.Expression.getStringValue(Expression.java:93)

I have been searching on google but got no result. Hope there is someone here can give me some usefull information.

Thanks in advance

James

[James.HD Li]

anyone can tell me where the parameter.templateDir defined?

[David Newton]

Without knowing *how* you get this error it's impossible to help.