Re: [igraph] large graph problem

[Tamás Nepusz]

Hi,

> It issues the following errors even I try to get the number of nodes in the 
> graph.
Seems like this error message has nothing to do with the number of nodes; an 
assertion fails in igraph_vector_size but that function is never called in 
igraph_vcount as it simply does this:

igraph_integer_t igraph_vcount(const igraph_t *graph) {
  return graph->n;
}

Your error message is likely to come from somewhere else, but I cannot say more 
without seeing your code.

> how many nodes can be handled by Igraph? 
Theoretically the upper limit is the amount of free memory only. igraph 
requires 16 bytes per edge and 8 bytes per vertex if you are using it from C 
and there is no attribute handler attached.

-- 
Tamas