Error in tree.model_network()

[RomStriker]

Hi,

I am trying to create a model from centerline swc file. However, when running the tree.model_network() method. I get the following error

Traceback (most recent call last):
  File "/home/roman/vascularmd/create_synthetic_data.py", line 31, in <module>
    tree.model_network()  # Parametric modeling of the network
  File "/home/roman/vascularmd/ArterialTree.py", line 484, in model_network
    original_label = self.__model_furcation(n, original_label, criterion, akaike, max_distance)
  File "/home/roman/vascularmd/ArterialTree.py", line 691, in __model_furcation
    nbifprec = list(self._model_graph.predecessors(e_in[0][0]))[0]
IndexError: list index out of range

It happens when it processes the first bifurcation. e_in contains the edge from the source to the first bifurcation, so e_in[0][0] is the source point with no predecessors.

I tried to fix it using a try block as below:

try:
	combine = True
	nbifprec = list(self._model_graph.predecessors(e_in[0][0]))[0]
	branch = list(self._model_graph.successors(nbifprec))
	branch = branch.index(e_in[0][0])
	bifprec = self._model_graph.nodes[nbifprec]['bifurcation']

	C0 = bifprec.get_apexsec()[branch][0] # If merged bifurcations, C0 is the apex section of the previous bifurcation
except:
	combine = False
	C0 = e_in[0][0]

but then it just seems to run forever. For a tree with 500 branches, how long should it take?