Uncaught TypeError: Cannot read property 'body' of undefined

When dragging nodes in the graph, after a while it produces this error in barnes_hut.coffee at line 36 where root is undefined.

[andreaferretti]

Thank you for the report! Actually, I really need to improve the force-directed graph. Right now, it is merely a toy, and it is the only chart that I do not consider usable in a real world setting.

This is top on my priority list, but unfortunately I did not have the time to work on Path recently - I hope to change this soon