ValueError: need at least one array to stack train_tacotron.py line 192

[Xlikes]

ValueError: need at least one array to stack

Traceback (most recent call last):
File "C:\Users\Pc\Downloads\ForwardTacotron-master\train_tacotron.py", line 192, in
trainer.train(model, optimizer)
File "C:\Users\Pc\Downloads\ForwardTacotron-master\trainer\taco_trainer.py", line 49, in train
self.train_session(model, optimizer, session=session)
File "C:\Users\Pc\Downloads\ForwardTacotron-master\trainer\taco_trainer.py", line 70, in train_session
for i, batch in enumerate(session.train_set, 1):
File "C:\Python39\lib\site-packages\torch\utils\data\dataloader.py", line 521, in next
data = self._next_data()
File "C:\Python39\lib\site-packages\torch\utils\data\dataloader.py", line 560, in _next_data
index = self._next_index() # may raise StopIteration
File "C:\Python39\lib\site-packages\torch\utils\data\dataloader.py", line 512, in _next_index
return next(self._sampler_iter) # may raise StopIteration
File "C:\Python39\lib\site-packages\torch\utils\data\sampler.py", line 229, in iter
for idx in self.sampler:
File "C:\Users\Pc\Downloads\ForwardTacotron-master\utils\dataset.py", line 337, in iter
binned_idx = np.stack(bins).reshape(-1)
File "<array_function internals>", line 5, in stack
File "C:\Python39\lib\site-packages\numpy\core\shape_base.py", line 423, in stack
raise ValueError('need at least one array to stack')
ValueError: need at least one array to stack

I have a problem with python train_tacotron.py
I have set the Num Validation down to 20. Can this be the cause of the problem?
(This setting must be so low because of the 21 files. I am aware of the poor quality.)

Windows 10
cuda 11.3.0
torch 1.10.2

[danjeffree]

Bit late but leaving here in case anyone if the future needs a fix.

Go to line 40 in trainer/taco_trainer.py

create a line under r, lr, max_step, bs = session_params
add bs = 2 or whatever number you need.