run error in stage 5 -----empty graph

[curlneuron]

Hi，
when i use the mini_librispeech in run.sh : Stage 5
Here is a problem.

Initializing dataset...
100%|███████████████████████████████████████████████████████████████████████████| 1519/1519 [00:01<00:00, 1170.80it/s]
Initializing dataset...
0%| | 0/1089 [00:00<?, ?it/s]
Traceback (most recent call last):
File "../../train.py", line 330, in
main()
File "../../train.py", line 126, in main
validset = ChainDataset(args.valid, no_feat=args.no_feat)
File "pychain_example/dataset.py", line 145, in init
graph = ChainGraph(fst, log_domain=True)
File "pychain/graph.py", line 70, in init
raise Exception("An empty graph encountered!")
Exception: An empty graph encountered!

[curlneuron]

If I just comment out the exception line(line #70) in graph.py, will there be any problem in the following stages?

[YiwenShaoStephen]

Yes. You can simply comment out that exception as I've already skipped empty graphs in dataset.py.

[groadabike]

If I just comment out the exception line(line #70) in graph.py, will there be any problem in the following stages?

Thank you, I was struggling with this part.