[2009-06-09 17:09:57 - HelloWorld] 
trouble processing "java/nio/channels/spi/AbstractInterruptibleChannel.class":
[2009-06-09 17:09:57 - HelloWorld] 
Attempt to include a core VM class in something other than a core library.
It is likely that you have attempted to include the core library from a desktop
virtual machine into an application, which will most assuredly not work. If
you really intend to build a core library -- which is only appropriate as
part of creating a full virtual machine binary, as opposed to compiling an
application -- then use the "--core-library" option to suppress this error
message. If you go ahead and use "--core-library" but are in fact building
an application, then please be aware that your build will still fail at some
point; you will simply be denied the pleasure of reading this helpful error
message.
[2009-06-09 17:09:57 - HelloWorld] 1 error; aborting
[2009-06-09 17:09:57 - HelloWorld] Conversion to Dalvik format failed with error 1