Error generating JasperReport.. HELP!

[hafidz]

I got this error while generating the JasperReport to PDF. Using eClipse. This is the error.

 

Code:

com.nic.generator.GenerationException: Failed to generate Jasper content
	at com.nic.generator.JasperGenerator.generate(JasperGenerator.java:297)
	at com.nic.doctemplate.panel.JasperPreview.<init>(JasperPreview.java:99)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at wicket.DefaultPageFactory.newPage(DefaultPageFactory.java:137)
	at wicket.DefaultPageFactory.newPage(DefaultPageFactory.java:79)
	at wicket.protocol.http.WebRequestCycle.bookmarkablePage(WebRequestCycle.java:404)
	at wicket.protocol.http.WebRequestCycle.parseRequest(WebRequestCycle.java:153)
	at wicket.RequestCycle.request(RequestCycle.java:408)
	at wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:208)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427)
	at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:473)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
	at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:635)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
	at org.mortbay.http.HttpServer.service(HttpServer.java:954)
	at org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
	at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983)
	at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
	at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
	at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
	at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
Caused by: java.lang.UnsupportedOperationException
	at java.util.AbstractMap.put(AbstractMap.java:186)
	at net.sf.jasperreports.engine.fill.JRBaseFiller.setParameters(JRBaseFiller.java:1066)
	at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:810)
	at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:89)
	at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:428)
	at com.nic.generator.JasperGenerator.generate(JasperGenerator.java:186)
	... 26 more

[lucianc]

What kind of parameters map are you passing to the fillReport method? Make sure that put() can be done on that map.

 

Regards,

Lucian