new-swisobject fails

I've been able to pull data

get-swisdata, get-swisobject

I've been able to updte data

set-swisobject

But this always fails for me

$newNodeUri=New-SwisObject$swis–EntityType"Orion.Nodes"–Properties$newNodeProps

New-SwisObject : Object reference not set to an instance of an object.

I don't understand why new-swisobject fails as the $swis connection works for everything else.