Route error when destination stop is approx. 60metres off network.

Question

Hi all, I have successfully created routes using my network, so I know the network works. But when I place a stop approx. 60 metres off the network, I would still like it to create the route to the closest point on the route, but instead it gives me an error. (ERROR 030212: Solve did not find a solution). If I then move the stop closer to the network it finds a solution. Can someone please advise where it is that I setup the tolerance distance that a stop can be off the network, as it appears I need to increase this.

For my solution I'm happy if it stops at the closest point on the network to the stop, no matter what the distance.

Thanks, Karina

Melinda Morang · Answer

For anyone looking at this issue in the future: The ArcGIS Pro documentation now includes a guide for troubleshooting unexpected network analysis results and problems with user-created network datasets: https://pro.arcgis.com/en/pro-app/latest/help/analysis/networks/troubleshoot-network-analysis-problems.htm.

Melinda Morang · Answer

Oh, that makes sense.  So your "landmarks" must have been included in the network as a junction source, and some of them were just sitting there by themselves and not connected to anything.

I'm not sure what you mean by "landmarks," but if you mean landmarks that get used in your turn-by-turn directions, here's the documentation for how to set that up: https://pro.arcgis.com/en/pro-app/latest/help/analysis/networks/setting-directions.htm#GUID-7996C48B-1926-493B-A09F-041ACFC5BE3B.  They should not be included as a junction source but instead as a Landmarks table.

KarinaVitiritti · Answer

Thanks Melinda, I have worked it out finally, it has taken much of the day looking at the network data. Thanks for making me aware that it was most likely the network dataset due to the error I received, as this turned my attention to the right area to look.

The issue was that with my network build I had included a few landmarks, but I couldn't work out how to set them up in the properties, so I just left them. I worked out that the error occurs when the stop created by myself, has its closest point being a landmark and not on the path or roads which make up the line network. If the landmark is the closest then it errors, but when I move the point to be closer to a road or path which I have setup correctly it runs fine with no error. So I now need to either workout how to add the landmarks properly into the properties or just remove them for now.

Thanks for your assistance.