diff --git a/taccl/routing.py b/taccl/routing.py
index c2d6789..22a1922 100644
--- a/taccl/routing.py
+++ b/taccl/routing.py
@@ -151,7 +151,7 @@ def _encode(self, opt):
 
         if self.topology.copies > 1:
             self._add_relay_relaxation(opt, SND)
-        if self.route_sketch.internode.enforce_ordering:
+        if self.route_sketch.internode is not None and self.route_sketch.internode.enforce_ordering:
             self._enforce_ordering(opt)
 
         self._add_symmetry(opt, L)
diff --git a/taccl/topologies/generic.py b/taccl/topologies/generic.py
index 5791bfd..abd2412 100644
--- a/taccl/topologies/generic.py
+++ b/taccl/topologies/generic.py
@@ -41,14 +41,18 @@ def validate_and_modify_topo(topo_json, check_links=True):
         topo_json["nics_per_node"] = -1
         topo_json["remote_alpha"] = -1
         topo_json["remote_beta"] = -1
-        topo_json["remote_invbws"] = -1
+        topo_json["remote_invbw"] = -1
     return topo_json
 
 def custom(topo_file):
-    topo_json = json.load(topo_file)
+    print("topo_file:", topo_file)
+    f = open(topo_file, "r")
+    topo_json = json.load(f)
     topo_json = validate_and_modify_topo(topo_json, check_links=True)
     gpus_per_node = topo_json["gpus_per_node"]
     links = topo_json["links"]
+    alpha = topo_json["alpha"]
+    betas = topo_json["betas"]
     invbws = topo_json["invbws"]
     nics_per_node = topo_json["nics_per_node"]
     remote_invbw = topo_json["remote_invbw"]