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Traceback (most recent call last):
File "D:\veighna_studio\lib\site-packages\vnpy\trader\ui\mainwindow.py", line 268, in open_widget
widget = widget_class(self.main_engine, self.event_engine)
File "D:\veighna_studio\lib\site-packages\vnpy_ctabacktester\ui\widget.py", line 57, in init
self.load_backtesting_setting()
File "D:\veighna_studio\lib\site-packages\vnpy_ctabacktester\ui\widget.py", line 243, in load_backtesting_setting
setting: dict = load_json(self.setting_filename)
File "D:\veighna_studio\lib\site-packages\vnpy\trader\utility.py", line 100, in load_json
data: dict = json.load(f)
File "D:\veighna_studio\lib\json__init.py", line 293, in load
return loads(fp.read(),
File "D:\veighna_studio\lib\json\
init__.py", line 346, in loads
return _default_decoder.decode(s)
File "D:\veighna_studio\lib\json\decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "D:\veighna_studio\lib\json\decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

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删掉.vntrader文件夹里的cta_strategy_setting.json再重启即可

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