Error processing GroovyPageView: null
===

 used Weceem plugin and Grails Framework to build a website, but I got many error messages such as follows:

    >>   	[ 25.07.2012 02:24:17.831] [qtp1295807352-3542] ERROR   
    >> org.codehaus.groovy.grails.web.servlet.view.GroovyPageView
    >>	org.codehaus.groovy.grails.web.servlet.view.GroovyPageView
    	
    >>	Error processing GroovyPageView: null
    >>	java.lang.NullPointerException
    	
    >>	[ 25.07.2012 02:24:16.884] [qtp1295807352-3542] ERROR
    >>	    org.codehaus.groovy.grails.web.errors.GrailsExceptionResolver
    >>	    org.codehaus.groovy.grails.web.errors.GrailsExceptionResolver
    	
    >>	Exception occurred when processing request: [GET] /*
    >>	Stacktrace follows:
    >>	org.codehaus.groovy.grails.web.pages.exceptions.GroovyPagesException: Error processing GroovyPageView: null
    >>	  at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565)
    >>	  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1360)
    >>	  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1331)
    >>	  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1331)
    >>	  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1331)
    >>	  at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1331)
    >>	  at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:477)
    >>	  at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
    	

      at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:542)
    	  at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
    	  at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031)
    	  at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406)
    	org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965)
    	  at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
    	y(QueuedThreadPool.java:599)
    	  at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534)
    	  at java.lang.Thread.run(Thread.java:662)
    	Caused by: java.lang.NullPointerException


Any idea for this kind of error?


Thanks in advance.
