portupgrade fails - how to fix?

[Torfinn Ingolfsen]

And here portupgrade fails again, on another machine:

root at kg-work2# portupgrade -R nasm pcre xterm mplayer gscan2pdf ImageMagick
[Gathering depends for devel/nasm  done]
[Exclude up-to-date packages  done]
[Gathering depends for devel/pcre  done]
[Exclude up-to-date packages  done]
[Gathering depends for x11/xterm
..............................................................................................
done]
[Exclude up-to-date packages ................................. done]
[Gathering depends for multimedia/mplayer
.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
done]
[Exclude up-to-date packages
................................................................................................................................................................................
done]
/usr/local/lib/ruby/site_ruby/1.8/pkginfo.rb:74:in `initialize': : Not
in due form: <name>-<version> (ArgumentError)
	from /usr/local/sbin/portupgrade:614:in `new'
	from /usr/local/sbin/portupgrade:614:in `main'
	from /usr/local/sbin/portupgrade:613:in `each'
	from /usr/local/sbin/portupgrade:613:in `main'
	from /usr/local/sbin/portupgrade:588:in `catch'
	from /usr/local/sbin/portupgrade:588:in `main'
	from /usr/local/lib/ruby/1.8/optparse.rb:1303:in `call'
	from /usr/local/lib/ruby/1.8/optparse.rb:1303:in `parse_in_order'
	 ... 7 levels...
	from /usr/local/lib/ruby/1.8/optparse.rb:785:in `initialize'
	from /usr/local/sbin/portupgrade:229:in `new'
	from /usr/local/sbin/portupgrade:229:in `main'
	from /usr/local/sbin/portupgrade:2208

This machine runs FreeBSd 7.0-stable:
root at kg-work2# uname -a
FreeBSD kg-work2.kg4.no 7.0-STABLE FreeBSD 7.0-STABLE #1: Mon Sep 22
23:02:46 CEST 2008     root at kg-work2.kg4.no:/usr/obj/usr/src/sys/SX270
 i386


As always, a single port as the argument to portupgrade doesn't fail.
HTH
-- 
Regards,
Torfinn Ingolfsen