Cannot read property 'neighbours' of undefined

[jonbonraki]

Uncaught TypeError: Cannot read property 'neighbours' of undefined.

it is emanating from the following loop, any idea why is this happening?
cola.js line 3332
Watch Expressions
"i ": Object
length: 144
source: "ds"
target: "sdf"

  while (i--) {
                var e = this.es[i];
                var u = getSourceIndex(e), v = getTargetIndex(e);
                var d = getLength(e);
                this.neighbours[u].neighbours.push(new Neighbour(v, d));
                this.neighbours[v].neighbours.push(new Neighbour(u, d));
            }

[adrianco]

I didn't think we were using cola.js yet, what's the context for the error?

[jonbonraki]

issue was resolved refer this tgdwyer/WebCola#128

[adrianco]

I hope you figure out some interesting additions to spigo with cola, could you let us know what you are trying and any results? Thanks!

[nellang]

I get the same error, I also read this ticket: tgdwyer/WebCola#128 but I don't know why in my code, some nodes take the linking (link 1 from image) but some not (link 0 from image). Those nodes are already in my nodes array.