Re: [igraph] shortest path on condition

[Tamas Nepusz]

> many thanks, I was not looking to suppress  the warning. I wanted to know if 
> I had problem to fix thus no warnings appear. 
There is no problem to fix here, igraph simply warns you that your graph is not
connected so some of the vertices are not reachable from the source vertex.
If you expected this, it is safe to suppress the warning. If you did not expect
this, it means that you have to figure out why your graph became disconnected
in the first place -- or you could restrict the target set of the shortest path
search so it does not include vertices that are not reachable from the source.

T.