[igraph] Error in read.graph.edgelist

[David Huffaker]

Hi there,

I'm getting an error when trying to load an edgelist into igraph.  At first I thought it might be my data, but when I tried with a sample edgelist in a tutorial, I get the same error:

> d <- read.graph("sample_edgelist.csv", format = "edgelist")

Error in read.graph.edgelist(file, ...) : 

  At rinterface.c:3705 : Cannot read edgelist, File operation error

Any ideas what I am doing wrong?  I'm using Mac and R 2.11.1

Thanks!

Dave