@In attribute requires non-null value: sampleAction.sample

Hi
If you are new to Seam framework and you get this stupid exception,You should read Seam annotation reference as well. OK this is my code :

[Sample class] …
…
@Name(“sample”)
public Class Sample ..
..
..

and next class is :

@Name(“sampleAction”)
public Class SampleAction …
….
..
@In
private Sample sample

public void someMethod(){
System.out.println(“I love Seam ….”);
}

…

….

And probably you get this exception :

javax.faces.FacesException: #{sampleAction.sample}: org.jboss.seam.
RequiredException: @In attribute requires non-null value: sampleAction.sample
	com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
	javax.faces.component.UICommand.broadcast(UICommand.java:387)
	org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:321)
	org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:296)
	org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:253)
	org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:466)
	com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
	com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)

OK, You should modify @In annotation :

@In(create=true)

enjoy it …
bye