getting exception

hi,

I am very new to Java Server Faces.I created one jsf page and when I am trying to run this page I am getting the following error.

javax.servlet.jsp.JspException: javax.el.PropertyNotFoundException: Target Unreachable, identifier 'POPBean' resolved to null

at com.sun.faces.taglib.html_basic.SelectOneMenuTag.doStartTag(SelectOneMenuTag.java:407)

at _Search__POP.__jsp_tag_ctru12_helper_13(_Search__POP.java:440)

[/Search_POP.jsp]

at _Search__POP._jspService(_Search__POP.java:179)

[/Search_POP.jsp]

Please help me how to resolve this exception.

[605 byte] By [siri85a] at [2007-11-27 11:01:57]
# 1

This exception will occur if the 'POPBean' is null.

Is it a managed bean? Then you need to define it in the faces-config.xml.

Is it a bean's property? Then you need to preinstantiate it in the backing bean.

BalusCa at 2007-7-29 12:40:07 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...
# 2

thankyou,can u tell me what is the difference between managed bean ,backing bean?

I have another problem I am trying to load an image using

<h:graphicimage>tag with attributes url and alt .But that image is not displaying in the browser.what should i do.Please tell me.I am very new to use these tags.

siri85a at 2007-7-29 12:40:07 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...
# 3

A managed bean is an instance of a backing bean.

Regarding to the image: read something about absolute and relative paths. And the <base href> might be useful for you. Nothing to do with JSF however.

BalusCa at 2007-7-29 12:40:07 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...
# 4

thankyou....

siri85a at 2007-7-29 12:40:07 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...