Re: [Boost-users] [Graph] Checking if a vertex_descriptor is valid

Obviously, vertex indice 424242 does not exist, but test fails, and function does not return, leading the a crash of the following algorithm (BFS or Dijkstra).

What did I do wrong?

Thanks for your help.

I would guess that the vertex() function is actually constructing a vertex object or descriptor - not actually trying to access the given vertex. You probably need to use the vertices() function to access the collection and then get the vertex that you need. Andrew Sutton andrew.n.sutton@gmail.com