portupgrade的错误。

错误提示如下：

---> Upgrading 'gnomemeeting-0.98.5' to 'gnomemeeting-0.98.5_2' (net/gnomemeeting)
---> Building '/usr/ports/net/gnomemeeting'
===> Cleaning for gnomemeeting-0.98.5_2
===> Vulnerability check disabled
===> Extracting for gnomemeeting-0.98.5_2
>> Checksum OK for gnomemeeting-0.98.5.tar.bz2.
===> Patching for gnomemeeting-0.98.5_2
===> Applying FreeBSD patches for gnomemeeting-0.98.5_2
===> gnomemeeting-0.98.5_2 depends on file: /nonexistent - not found
===> Verifying build for /nonexistent in /usr/ports/net/openh323
===> openh323-1.12.0_3 is forbidden: http://people.freebsd.org/~eik/porta...ed76ef5a.html.
*** Error code 1

Stop in /usr/ports/net/openh323.
*** Error code 1

Stop in /usr/ports/net/gnomemeeting.
---> Skipping 'x11/gnome2' (gnome2-2.4.0) because 'net/gnomemeeting' (gnomemeeting-0.98.5) failed
! net/gnomemeeting (gnomemeeting-0.98.5) (unknown build error)
* x11/gnome2 (gnome2-2.4.0)
---> Packages processed: 0 done, 159 ignored, 1 skipped and 1 failed



请问到底是怎么回事？
如何解决？