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The problem of Java petstore

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I am preparing for my SCBCD test and try to install the Java petsrore 1.3.2
on my redhat 8.0 machine. I follow the steps in the doc(install j2sdkee1.3.1 and j2sdk1.4.2, set JAVA_HOME, J2EE_HOME and path). I use root to run cloudscape,j2ee and "setup deploy" . I can get the main page of petstore without any error. But when I choose specific items of some Category, the web page shows nothing about this item and I get the error message
----------------------- javax.servlet.ServletException: An error occurred while evaluating custom action attribute "value" with value "${item.attribute}": Unable to find a value for "attribute" in object of class "com.sun.j2ee.blueprints.catalog.model.Item" using operator "."
at Method)
at org.apache.catalina.core.ApplicationDispatcher.include(
at com.sun.j2ee.blueprints.waf.view.template.tags.InsertTag.doEndTag(
at org.apache.jsp.template$jsp._jspService(template$


I doubt there is sth wrong about cloudscape database, but I don't know how to do. Is there anyone has any idea. Thanks a lot
Don't get me started about those stupid light bulbs.
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