Space syntax plugin help

Hi There,

I am trying to form a schedule of accommodation for an upcoming architectural project using the Space syntax plugin. I am having trouble getting it to work properly, especially the forces pulling the points together. The error message I'm getting is:

1. Solution exception:Object reference not set to an instance of an object.

I have tried breaking down the schedule of accommodation in to 2 parts but no luck. I have used the same grasshopper formula on a test schedule and it works a fine. Would the quantity of points really give me a problem or is there something I'm not doing right?

I have attached the rhino and grasshopper file if it helps anyone understand my predicament. Any help would be much appreciated.

Thanks!

Marc