com.opensymphony.xwork2.interceptor.ParametersInterceptor setParameters

ParametersInterceptor – [setParameters]: Unexpected Exception caught setting FIELDNAME on CLASSNAME

This exception occurs if you have missed getters and setters for your class variable.

This warning is generated since you have specified formName.action in action attribute of form.You get get rid of those by changing the action attribute to formName instead of formName.action

Reason for Error

 <s:form action="Reports.action" method="post">

Change it To

 <s:form action="Reports" method="post" namespace="/">