Hello, i am using the html hidden tag as follows <html:hidden name="model" property="actualAddress.primaryKeyString"/>. The bean model is available and has the function public Address getActualAddress(); and Address has the function public String getPrimaryKeyString(); If the getter method of the bean model returns null (getActualAddress()) then we receive the following error message. java.lang.IllegalArgumentException: Null property value for 'actualAddress' at org.apache.struts.util.PropertyUtils.getNestedProperty(PropertyUtils.java:417) at org.apache.struts.util.PropertyUtils.getProperty(PropertyUtils.java:453) at org.apache.struts.util.RequestUtils.lookup(RequestUtils.java:503) at org.apache.struts.taglib.html.BaseFieldTag.doStartTag(BaseFieldTag.java:188) at _jsp._vsdev._businesspartner._test__jsp._jspService(/vsdev/businesspartner/test.jsp:23) at com.caucho.jsp.JavaPage.service(JavaPage.java:87) at com.caucho.jsp.JavaPage.subservice(JavaPage.java:81) at com.caucho.jsp.Page.service(Page.java:407) at com.caucho.server.http.Invocation.service(Invocation.java:285) at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:121) at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:238) at com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:157) at com.caucho.server.TcpConnection.run(TcpConnection.java:140) at java.lang.Thread.run(Thread.java:484) In my opinion the html:hidden field should render null value, like a call without dotted path and null value. What is your opinion ? Should we catch the exception in RequestUtils ? or in each Tag ? I can fix it if you will tell me how i should do it. Thanks Markus