From 2ccf95c574517e5ec28c3749a1ceff796d304aad Mon Sep 17 00:00:00 2001
From: Dobson <bdobson@ic.ac.uk>
Date: Mon, 29 Apr 2024 15:47:37 +0100
Subject: [PATCH] Update graph_utilities.py

more verbosity
---
 swmmanywhere/graph_utilities.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/swmmanywhere/graph_utilities.py b/swmmanywhere/graph_utilities.py
index 16c9ad40..f4d62923 100644
--- a/swmmanywhere/graph_utilities.py
+++ b/swmmanywhere/graph_utilities.py
@@ -185,6 +185,12 @@ def iterate_graphfcns(G: nx.Graph,
         logger.info(f"graphfcn: {function} completed.")
         if verbose:
             save_graph(G, addresses.model / f"{function}_graph.json")
+            go.graph_to_geojson(G,
+                                addresses.model / f"{function}_nodes.geojson",
+                                addresses.model / f"{function}_edges.geojson",
+                                G.graph['crs']
+                                )
+            
     return G
 
 @register_graphfcn
@@ -1114,6 +1120,11 @@ def __call__(self, G: nx.Graph,
             G.remove_node(node)
             del paths[node], shortest_paths[node]
 
+        if len(G.nodes) == 0:
+            raise ValueError("""No nodes with path to outlet, consider 
+                             broadening bounding box or removing trim_to_outlet
+                             from config graphfcn_list""")
+
         edges_to_keep: set = set()
         for path in paths.values():
             # Assign outlet