You shouldn't set variables with clua console, unless you know what you are doing. I'm afraid it's possible you have to start another game.
There're two ways this can go(save beforehand!):
1) In your current game, pause, and open console:
CLUAConsole:SetGlobal("ViconiaMatch","GLOBAL",1)
CLUAConsole:SetGlobal("ViconiaRomance","GLOBAL",1)
CLUAConsole:SetGlobal("ViconiaRomanceActive","GLOBAL",1)
CLUAConsole:AdvanceRealTime(99999)
2) Viconia won't romance Half-orcs, unless you have G3 Fixpack installed:
http://www.gibberlings3.net/bg2fixpack/ - but you should first uninstall your mods or restore a clean install as per this topic:
http://forums.pocketplane.net/index.php/topic,17555 - because fixpack should be installed first.