would be helpful to see the full command. likely a typo.
The first disk you have oc.32 and probably should be 0c.32
(zero instead of the letter o)
or try
aggr create aggr_name -t raid_dp -T FC-AL -r 16 -n 32
(create an aggr using RAID-DP, type FCAL, 16 disks per raid group, use 32 disks, show-me but not not apply)
If you like the output, then drop the -n and run again.
Also, why not use the GUI?