AttributeError: 'NoneType' object has no attribute 'realizedPnL' immediately after " python main.py" is executed

[developeralgo8888]

Traceback (most recent call last):
File "/home/miniconda3/lib/python3.8/site-packages/eventkit/event.py", line 184, in emit
func(obj, *args)
File "/developer/Downloads/High-Frequency-Trading-Model-with-IB/models/hft_model_1.py", line 78, in on_tick
self.perform_trade_logic()
File "/developer/Downloads/High-Frequency-Trading-Model-with-IB/models/hft_model_1.py", line 101, in perform_trade_logic
self.print_strategy_params()
File "/developer/Downloads/High-Frequency-Trading-Model-with-IB/models/hft_model_1.py", line 127, in print_strategy_params
rpnl=self.pnl.realizedPnL,
AttributeError: 'NoneType' object has no attribute 'realizedPnL'

Note sure what is missing in ib_sync or interactive Brokers response.

[pengfengyong]

I also meet this problem, whether you solved this problem?