Closed Loop Network

[nhpakosky]

Is there any way to map a network that results in a closed loop? I am working on a project that highlights the movement of materials from point to point across a period of time. So, it's likely that point A will supply point B, point B will supply point C, and point C will eventually supply point A. When I add the link to my dataset that closes the loop of this network, the plot doesn't generate correctly.