I have tried several queries with different errors:

>twiddle.bat --user=admin --password=admin invoke jboss:service=JNDIView list true
08:15:37,343 ERROR [Twiddle] Exec failed
javax.management.MalformedObjectNameException: Unterminated key property part
at javax.management.ObjectName.construct(ObjectName.java:465)
at javax.management.ObjectName .<init>(ObjectName.java:1304)
at org.jboss.console.twiddle.command.MBeanServerCommand.queryMBeans(MBeanServerCommand.java:68)
at org.jboss.console.twiddle.command.InvokeCommand.execute(InvokeCommand.java :274)
at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:305)

>twiddle.bat --user=admin --password=admin get jboss:service=invoker,type=jrmp
08:16:25,453 ERROR [Twiddle] Command failure
org.jboss.console.twiddle.command.CommandException: Invalid object name: jboss:service
at org.jboss.console.twiddle.command.MBeanServerCommand.createObjectName (MBeanServerCommand.java:53)
at org.jboss.console.twiddle.command.GetCommand.processArguments(GetCommand.java:123)
at org.jboss.console.twiddle.command.GetCommand.execute(GetCommand.java:142)
at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:305)