Any alternative to curve.shortestwalk

Hello everyone,
I am running escape route analysis for which I want to find the shortest route using dynamo. The node provided by the Lunchbox Curve.ShortestWalk is not working. Can anyone suggest a solution, perhaps an alternative? Screenshot is attached. This script was originally made by Dieter Vermeulen

can you provide the errors i.e. yellow nodes

I’d suggest breaking your graph down into a series of simpler steps, to help troubleshoot it