Present in version 6.9 but also in version 7.4.
\nbproject\xml_binding_build.xml:17:
java.lang.IllegalArgumentException: Illegal pattern character 'g'
at java.text.SimpleDateFormat.compile(SimpleDateFormat.java:768)
at java.text.SimpleDateFormat.initialize(SimpleDateFormat.java:575)
at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:500)
at com.sun.tools.xjc.Options.getPrologComment(Options.java:924)
at com.sun.tools.xjc.Options.createCodeWriter(Options.java:909)
at com.sun.tools.xjc.Options.createCodeWriter(Options.java:899)
at com.sun.tools.xjc.XJC2Task._doXJC(XJC2Task.java:523)
at com.sun.tools.xjc.XJC2Task.doXJC(XJC2Task.java:454)
at com.sun.tools.xjc.XJC2Task.execute(XJC2Task.java:379)
at com.sun.istack.tools.ProtectedTask.execute(ProtectedTask.java:103)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
It is fixed by adding
"-J-Duser.language=en"
to the netbeans_default_options property in the netbeans.conf file