swinstall and rpc exception communications error

error when doing an swinstall:
       * Beginning Selection
ERROR:   RPC exception: "Communications failure (dce / rpc)" 11/24/06
         17:27:01 PST
ERROR:   A Remote Procedure Call to a daemon has failed.  Could not
         start a management session for "myhost:/".  Make sure the host
         is accessible from the network, and that its daemon, swagentd,
         is running.
       * Target connection failed for "myhost:/".
ERROR:   More information may be found in the daemon logfile on this
         target (default location is myhost:/var/adm/sw/swagentd.log).
       * Selection had errors.

fix by restarting swagentd:
/sbin/init.d/swagentd stop
/sbin/init.d/swagentd start

mkboot complains about logical volumes when none exist

$ mkboot /dev/dsk/c2t6d0
There appear to be non-boot logical volumes on this device.
Overwriting them could destroy all the data on this device
Should the logical volumes be overwritten [y/n]? y

solution:
because PV isn't marked as bootable.   pvcreate -B /dev/dsk/c2t6d0
or
PV belongs (or thinks it does) to a volume group already.  (tread lightly here!):
Fix by using the -f (force) option:  pvcreate -Bf /dev/dsk/c2t6d0 

upgrade vxfs online

update version 3 veritas JFS file system to version 4

vxupgrade -n 4 /mount_point

vxfsconvert -- offline version or to convert an HFS