Runtime Error: 'NoneType' object has no attribute 'Reset' at OnSecuritiesChanged by David L

Hi everyone,

I keep on getting:

"Runtime Error: 'NoneType' object has no attribute 'Reset' at OnSecuritiesChanged symbolData.Reset() at Python.Runtime.PythonException.ThrowLastAsClrException() at Python.Runtime.PyObject.Invoke(PyTuple args in portfolio.py: line 130"

between 2017-2018 in my backtests. Does anyone know how I could fix this error or continue through the backtest by skipping that data point?

Hi Ryan Bell ,

It is not possible to perform a full backtest in a notebook.
The PSR is not available at the "algorithm level", it belongs to the "engine level" in the result handler. After we run the backtest, its final value and a rolling window are available in the results json file.

What is the objective of testing using a small data slice? If we know that we give a concrete answer.

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