请问想进行日内回测是这样设置的吗？
但我这样去做回测的话，会提触发异常：
Traceback (most recent call last):
File "C:\veighna_studio\lib\threading.py", line 1009, in _bootstrap_inner
self.run()
File "C:\veighna_studio\lib\threading.py", line 946, in run
self._target(*self._args, **self._kwargs)
File "C:\veighna_studio\lib\site-packages\vnpy_ctabacktester\engine.py", line 186, in run_backtesting
engine.load_data()
File "C:\veighna_studio\lib\site-packages\vnpy_ctastrategy\backtesting.py", line 204, in load_data
progress += progress_days / total_days
ZeroDivisionError: division by zero
但假如把时间改成两天，比如是16号到17号就没问题，是什么原因呢？
