Traceback (most recent call last):
File "D:\veighna_studio\lib\site-packages\vnpy_ctabacktester\engine.py", line 192, in run_backtesting
engine.run_backtesting()
File "D:\veighna_studio\lib\site-packages\vnpy_ctastrategy\backtesting.py", line 219, in run_backtesting
self.strategy.on_init()
File "C:\Users\73175\strategies\Trendline_strategy.py", line 49, in on_init
self.load_bar(10)
File "D:\veighna_studio\lib\site-packages\vnpy_ctastrategy\template.py", line 315, in load_bar
callback(bar)
File "C:\Users\73175\strategies\Trendline_strategy.py", line 77, in on_bar
self.bg15.update_bar(bar)
File "D:\veighna_studio\lib\site-packages\vnpy\trader\utility.py", line 277, in update_bar
self.update_bar_minute_window(bar)
File "D:\veighna_studio\lib\site-packages\vnpy\trader\utility.py", line 316, in update_bar_minute_window
self.on_window_bar(self.window_bar)
File "C:\Users\73175\strategies\Trendline_strategy.py", line 124, in on_15min_bar
var2 = numpy.flipud(var1)
File "<__array_function__ internals>", line 180, in flipud
File "D:\veighna_studio\lib\site-packages\numpy\lib\twodim_base.py", line 154, in flipud
raise ValueError("Input must be >= 1-d.")
ValueError: Input must be >= 1-d.
