Error when attempting to build for beaglebone

I have been building images for the beagleboard without problem, but now with beaglebone, I get this error with a fresh clone:

Executing: MACHINE=beaglebone bitbake virtual/kernel
Pseudo is not present but is required, building this first before the main build
ERROR: Failure expanding variable PRINC[:=], expression was ${@int(PRINC) + 1} which triggered exception NameError: name 'PRINC' is not defined
ERROR: Command execution failed: Exited with 1

I have tried searching previous messages to no avail. Any suggestions?

Regards,

Dave.

I just found an answer to my question in the Angstrom mailing list. Apparently it is a bug in the latest release. A workaround is to add:

PRINC = 0

to bitbake.conf

Dave.