Catch FindShortestNetworkPath

[pieter_souvereyns]

I want to use 'FindShortestNetworkPath'.

It works when I 'll try with conditions that are connected, that there is a solution.
But when the user give a structure that is not possible to connect to each other,  I can't catch this error.
I get this message "Value does not fall within the expected range."
But not as an error that it goes to the catch. 

Somebody experience with this?

Try
PathColl = Network.FindShortestNetworkPath(structure_start, structure_end, lengt)
Catch ex As Exception
Exit Sub
End Try

Regards
Pieter

[Jeff_M · Accepted solution]

This correctly catches the exception using c#:

            try
            { 
                var ids = Network.FindShortestNetworkPath(part1, part2, ref len); 
            }
            catch (System.Exception) 
            { }

 Perhaps specify System.Exception instead of just Exception.

[pieter_souvereyns]

That something to remember for the future
try with a variable that is unspecified
Thanks