looks to be a bug.
Tried the following, all fail:
Caption NOT LIKE '%node%' Nodes.Caption NOT LIKE '%node%' Node.Caption NOT LIKE '%node%' Caption = 'node' Nodes.Caption = 'node' Node.Caption = 'node'
IIRC, the syntax should be Nodes.Entity [Operand] [Value], using % as your wildcard. (obviously that's not working)
Funny enough though, Vendor = 'Cisco' actually does work... (while Node.Vendor and Nodes.Vendor both fail).
I'd open a ticket and get it reported.
I do already have the view displaying all the correct vendor devices. The problem lies in not being able to filter out certain devices by their caption. Do you have a method for accomplishing that?