In a calculated Item, it seems that system.swap.size[,total] is not usable:

19113:20100828:134414.962 Format error or unsupported operator. Exp: [

{system.swap.size[,total]}]
19113:20100828:134414.962 Item [octopod:system.swap.size[,used]] error: Format error or unsupported operator. Exp: [{system.swap.size[,total]}

]
19113:20100828:134414.962 Parameter [octopod:system.swap.size[,used]] is not supported by agent Old status [0]

I was attempting to create an Item system.swap.size[,used] (which I think should have been implemented anyway!):

(

{system.swap.size[,total]}

*

{system.swap.size[,pused]}

)/100.0