Netbeans e javadoc

Oi pessoal estou abrindo este tópico pois estou com problemas em criar uma javadoc do meu projeto.
O que acontece é que ao clicar sobre o projeto e depois em gerar javadoc ocorre os seguinte erro:

Standard Doclet version 1.6.0_21
Building tree for all the packages and classes...
java.lang.IllegalArgumentException
        at sun.net.www.ParseUtil.decode(ParseUtil.java:189)
        at sun.misc.URLClassPath$FileLoader.<init>(URLClassPath.java:958)
        at sun.misc.URLClassPath$3.run(URLClassPath.java:328)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.misc.URLClassPath.getLoader(URLClassPath.java:322)
        at sun.misc.URLClassPath.getLoader(URLClassPath.java:299)
        at sun.misc.URLClassPath.findResource(URLClassPath.java:145)
        at java.net.URLClassLoader$2.run(URLClassLoader.java:385)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findResource(URLClassLoader.java:382)
        at java.lang.ClassLoader.getResource(ClassLoader.java:1003)
        at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1193)
        at javax.xml.parsers.SecuritySupport$4.run(SecuritySupport.java:96)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.xml.parsers.SecuritySupport.getResourceAsStream(SecuritySupport.java:89)
        at javax.xml.parsers.FactoryFinder.findJarServiceProvider(FactoryFinder.java:250)
        at javax.xml.parsers.FactoryFinder.find(FactoryFinder.java:223)
        at javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:128)
        at com.sun.tools.doclets.internal.toolkit.builders.LayoutParser.parseXML(LayoutParser.java:72)
        at com.sun.tools.doclets.internal.toolkit.builders.ClassBuilder.build(ClassBuilder.java:108)
        at com.sun.tools.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:155)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:177)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:161)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:106)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
        at com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
        at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
        at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
        at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
        at com.sun.tools.javadoc.Start.begin(Start.java:128)
        at com.sun.tools.javadoc.Main.execute(Main.java:41)
        at com.sun.tools.javadoc.Main.main(Main.java:31)
com.sun.tools.doclets.internal.toolkit.util.DocletAbortException
        at com.sun.tools.doclets.internal.toolkit.builders.LayoutParser.parseXML(LayoutParser.java:79)
        at com.sun.tools.doclets.internal.toolkit.builders.ClassBuilder.build(ClassBuilder.java:108)
        at com.sun.tools.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:155)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:177)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:161)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:106)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
        at com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
        at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
        at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
        at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
        at com.sun.tools.javadoc.Start.begin(Start.java:128)
        at com.sun.tools.javadoc.Main.execute(Main.java:41)
        at com.sun.tools.javadoc.Main.main(Main.java:31)
com.sun.tools.doclets.internal.toolkit.util.DocletAbortException
        at com.sun.tools.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:159)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:177)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:161)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.startGeneration(AbstractDoclet.java:106)
        at com.sun.tools.doclets.internal.toolkit.AbstractDoclet.start(AbstractDoclet.java:64)
        at com.sun.tools.doclets.formats.html.HtmlDoclet.start(HtmlDoclet.java:42)
        at com.sun.tools.doclets.standard.Standard.start(Standard.java:23)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.tools.javadoc.DocletInvoker.invoke(DocletInvoker.java:269)
        at com.sun.tools.javadoc.DocletInvoker.start(DocletInvoker.java:143)
        at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:340)
        at com.sun.tools.javadoc.Start.begin(Start.java:128)
        at com.sun.tools.javadoc.Main.execute(Main.java:41)
        at com.sun.tools.javadoc.Main.main(Main.java:31)
Generating C:\meuprojeto\proj-WEB\dist\javadoc\br/com/proj/magagedbean/\painel.html...
4 warnings
C:\meuprojeto\proj-WEB\nbproject\build-impl.xml:868: Javadoc returned 1
FALHA NA CONSTRUÇÃO (tempo total: 2 segundos)

Estou usando netbeans 6.9.

Testei com o netbeans 7, mas o problema continua, será que não é algum problema com minhas variáveis da ambiente?