[OpenAFS] Missing symbol bhv_version_read_lock for OpenAFS 1.2.11 and IRIX64

[Gaunsezlae Polite]

Some assistance please. I've installed successfully OpenAFS 1.2.11
on an O2 (IP32,IRIX), but on an Origin 2000 (IP27,IRIX64) the kernel module
libafs.IP27.nonfs.o is missing a symbol. The error message follows:

Oct 14 09:50:32 4A:behemoth unix: |$(0x709)WARNING: /usr/vice/etc/sgiload/libafs.IP27.nonfs.o: symbol 
bhv_version_read_lock not found

It's a warning, but it's fatal:

behemoth.mitre.org# /etc/init.d/afs.rc start
Error loading module Afs_:  Can't resolve all symbols in object.
Dynamic load of AFS failed - Aborting AFS start

Is there a newer version of the module libafs.IP27.nonfs.o ?

             Gaunsezlae