portupgrade的错误。

梦幻者言

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/p ... -0020ed76ef5a.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？