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I am also Facing same issue when i try to use cewolf with struts .
When i add the cewolf jar files to the lib folder under WEB-INF,
I get the following exception

[5/21/08 14:26:27:096 EDT] 00000029 PmiRegistry W PMON0023W: Unable to register PMI module due to duplicate name: action
[5/21/08 14:26:27:111 EDT] 00000029 PropertyMessa I org.apache.struts.util.PropertyMessageResources <init> Initializing, config='org.apache.struts.action.ActionResources', returnNull=true
[5/21/08 14:26:27:127 EDT] 00000029 ActionServlet E org.apache.struts.action.ActionServlet initServlet null java.lang.IllegalStateException: can't declare any more prefixes in this context

Can anybody please help me out in fixing this as this is urgent to me and i am unable to understand why his problem arises and when the remove the jars from the folder , the struts flow works fine .