Error with clustering

Hi
I was trying to calculate the clustering coefficients both local and global
for a Price network (Nodes =100000) but instead of returning a value it
just gives me zeroes for both local and global.
What's wrong?
SB

attachment.html (429 Bytes)

There is nothing wrong if your network has no triangles. A price
network with out-degree 1 has no triangles.

Best,
Tiago