VelocityReport Plugin

I get this error calling the getPDFReport() function in Headless Client and Web Client (from application server).

2010-11-26 12:04:00,282 ERROR [pool-4-thread-1] com.servoy.j2db.util.Debug - Throwable
java.awt.HeadlessException
at java.awt.dnd.DropTarget.<init>(DropTarget.java:79)
at java.awt.dnd.DropTarget.<init>(DropTarget.java:125)
at com.apple.laf.AquaFileChooserUI.installListeners(AquaFileChooserUI.java:165)
at com.apple.laf.AquaFileChooserUI.installUI(AquaFileChooserUI.java:122)
at javax.swing.JComponent.setUI(JComponent.java:662)
at javax.swing.JFileChooser.updateUI(JFileChooser.java:1798)
at javax.swing.JFileChooser.setup(JFileChooser.java:360)
at javax.swing.JFileChooser.<init>(JFileChooser.java:333)
at javax.swing.JFileChooser.<init>(JFileChooser.java:286)
at net.stuff.servoy.plugin.velocityreport.PluginProvider$4.<init>(PluginProvider.java:1654)
at net.stuff.servoy.plugin.velocityreport.PluginProvider.createJFileChooser(PluginProvider.java:1654)
at net.stuff.servoy.plugin.velocityreport.PluginProvider.<init>(PluginProvider.java:199)
at net.stuff.servoy.plugin.velocityreport.Plugin.getScriptObject(Plugin.java:109)
at com.servoy.j2db.scripting.PluginScope.get(PluginScope.java:119)
at org.mozilla.javascript.ScriptableObject.getProperty(ScriptableObject.java:1641)
at org.mozilla.javascript.ScriptRuntime.getObjectProp(ScriptRuntime.java:1429)
at org.mozilla.javascript.ScriptRuntime.getObjectProp(ScriptRuntime.java:1418)
at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3343)
at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2680)
at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:166)
at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:387)
at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3127)
at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:165)
at com.servoy.j2db.scripting.ScriptEngine.executeFunction(ScriptEngine.java:458)
at com.servoy.j2db.plugins.ClientPluginAccessProvider$MethodExecutor.run(ClientPluginAccessProvider.java:511)
at com.servoy.j2db.server.headlessclient.SessionClient.invokeAndWait(SessionClient.java:1170)
at com.servoy.j2db.server.headlessclient.SessionClient.invokeLater(SessionClient.java:1160)
at com.servoy.j2db.plugins.ClientPluginAccessProvider$1.run(ClientPluginAccessProvider.java:439)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)

For reproduce this error you can import the sample solution of the VelocityReport in an application server and try to generate a pdf.