Traceback (most recent call last):


 "train.py", line 121, in <module>

main(arg_dic)


 "train.py", line 94, in main

trainer.fit(system)


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/trainer/states.py", line 48, in wrapped_fn

result = fn(self, *args, **kwargs)


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/trainer/trainer.py", line 1084, in fit

results = self.accelerator_backend.train(model)


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/accelerators/cpu_backend.py", line 39, in train

results = self.trainer.run_pretrain_routine(model)


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/trainer/trainer.py", line 1224, in run_pretrain_routine

self._run_sanity_check(ref_model, model)


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/trainer/trainer.py", line 1249, in _run_sanity_check

self.reset_val_dataloader(ref_model)


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/trainer/data_loading.py", line 337, in reset_val_dataloader

self.num_val_batches, self.val_dataloaders = self._reset_eval_dataloader(model, 'val')


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/trainer/data_loading.py", line 299, in _reset_eval_dataloader

num_batches = len(dataloader) if _has_len(dataloader) else float('inf')


 "/home/elen/anaconda3/lib/python3.8/site-packages/pytorch_lightning-0.9.1rc4-py3.8.egg/pytorch_lightning/trainer/data_loading.py", line 70, in _has_len

raise ValueError('`Dataloader` returned 0 length.'
ValueError: `Dataloader` returned 0 length. Please make sure that your Dataloader at least returns 1 batch

Traceback (most recent call last):


 "/home/patrick/miniconda3/envs/hummingbot/lib/python3.8/asyncio/events.py", line 81, in _run

self._context.run(self._callback, *self._args)


 "/home/patrick/miniconda3/envs/hummingbot/lib/python3.8/site-packages/prompt_toolkit/application/application.py", line 652, in read_from_input

self.key_processor.process_keys()


 "/home/patrick/miniconda3/envs/hummingbot/lib/python3.8/site-packages/prompt_toolkit/key_binding/key_processor.py", line 274, in process_keys

self._process_coroutine.send(key_press)


 "/home/patrick/miniconda3/envs/hummingbot/lib/python3.8/site-packages/prompt_toolkit/key_binding/key_processor.py", line 186, in _process

self._call_handler(matches[-1], key_sequence=buffer[:])


 "/home/patrick/miniconda3/envs/hummingbot/lib/python3.8/site-packages/prompt_toolkit/key_binding/key_processor.py", line 329, in _call_handler

handler.call(event)


 "/home/patrick/miniconda3/envs/hummingbot/lib/python3.8/site-packages/prompt_toolkit/key_binding/key_bindings.py", line 101, in call

self.handler(event)


 "/home/patrick/hummingbot/hummingbot/client/ui/keybindings.py", line 34, in status

hb.status()


 "/home/patrick/hummingbot/hummingbot/client/command/status_command.py", line 129, in status

self._notify(self.strategy.format_status() + "\n")


 "hummingbot/strategy/cross_exchange_market_making/cross_exchange_market_making.pyx", line 199, in hummingbot.strategy.cross_exchange_market_making.cross_exchange_market_making.Cross$

df = LimitOrder.to_pandas(limit_orders)


 "hummingbot/core/data_type/limit_order.pyx", line 30, in hummingbot.core.data_type.limit_order.LimitOrder.to_pandas

pd.Timestamp(int(time.time()) - int(order.client_order_id.split("-")[-1])/1e6,
ValueError: invalid literal for int() with base 10: 'WETH/916fb71e8c6d4f84388700e4b2'
