[oe] First compilation issues

[Won J Jeon]

I successfully compiled Angstrom Linux with OE and now I am trying to learn
how to use OE on my Ubuntu 9.04. While I was following the simple
instruction to compile 'myhelloworld' in the manual, I have the following
error messages:

$ bitbake -b recipes/myhelloworld/myhelloworld_0.1.bb
/var/lib/python-support/python2.6/bb/COW.py:29: DeprecationWarning: the sets
module is deprecated
  import types, sets
NOTE: Preparing runqueue
NOTE: Executing runqueue
NOTE: Running task 1 of 19 (ID: 1, /OE/openembedded/recipes/myhelloworld/
myhelloworld_0.1.bb, do_setscene)
ERROR: function staging_helper failed
ERROR: see log in
${OETREE}/angstrom-dev/work/armv5te-angstrom-linux-gnueabi/myhelloworld-0.1-r0/temp/log.staging_helper.9492
NOTE: Task failed:
${OETREE}/angstrom-dev/work/armv5te-angstrom-linux-gnueabi/myhelloworld-0.1-r0/temp/log.staging_helper.9492
ERROR: TaskFailed event exception, aborting
ERROR: Build of
/OE/openembedded/recipes/myhelloworld/myhelloworld_0.1.bbdo_setscene
failed
ERROR: Task 1 (/OE/openembedded/recipes/myhelloworld/myhelloworld_0.1.bb,
do_setscene) failed
NOTE: Tasks Summary: Attempted 0 tasks of which 0 didn't need to be rerun
and 1 failed.
ERROR: '/OE/openembedded/recipes/myhelloworld/myhelloworld_0.1.bb' failed

Can you let me know these errors occur? Thanks in advance.