ZeroDivisionError in GraPhlAn

Infrastructure and utilities GraPhlAn
1

Hi, am getting this following error when running GraPhlAn 1.1.3

File "/Users/alb/anaconda3/envs/graphlan/bin/graphlan.py", line 79, in <module>
    reorder_tree=args['avoid_reordering'])
  File "/Users/alb/anaconda3/envs/graphlan/bin/src/graphlan_lib.py", line 945, in draw
    self.set_clade_data()
  File "/Users/alb/anaconda3/envs/graphlan/bin/src/graphlan_lib.py", line 386, in set_clade_data
    self._varf = varf/tot_dist if self.clade_separation > 0.0 else 0.0
ZeroDivisionError: float division by zero

I am getting this when running this command

 graphlan.py --dpi 300 --size 7.0 outtree.txt outimg.png --external_legends

I already run the graphlan_annotate.py without any error, and this come from the export2graphlan.py pipeline from Lefse.

Any idea on where this could come from and any help?
Thanks!