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Object not callable ERROR midway in backtest

Hello,

I am facing this error while backtesting and somehow it fails after running the backtest until midway. The same code works with smaller universe.

Code Line - 

for time, row in history.loc[symbol].iterrows():

Error - 

Runtime Error: TypeError : object is not callable
at OnSecuritiesChanged in main.py:line 52
at __init__ in main.py:line 138
TypeError : object is not callable (Open Stacktrace)
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Any help would be appreciated.!!

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Hi Ray,

This issue surfaced because the `history` DataFrame was empty for the given symbol. The symbol causing the problem in this situation is DRYS. For some reason, the `History` method returns an empty DataFrame for DRYS during backtesting while returning a full DataFrame in the research environment. I've opened a GitHub issue for this bug. Its progression can be tracked here.

Best,
Derek Melchin

0

The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.


Thank you Derek Melchin 

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Update Backtest





0

The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.


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