I am trading through IB. There are are some positions belongs to NBR in my account.

The first Fill of NBR is 2021 - 03 - 29 and the last Fill is 2021 - 06 - 07. I received error message at 2021 - 06 - 12. Here is the error message:

During the algorithm initialization, the following exception has occurred: Error connecting to brokerage: InteractiveBrokersBrokerage.MapSymbol(): Failed to convert contract for NBR;

Contract description: WAR NBR USD  VALUE 20260611 166.6667 C.

This may be caused by incorrect login credentials or an unsupported account type.InteractiveBrokersBrokerage.MapSymbol(): Failed to convert contract for NBR;

Please manually close the position or cancel the order before restarting the algorithm.


  • Is it an issue from IB or from QC?
  • Is it the other choice is to close the position manually?
  • How can my algo perform those trades while now I cannot start the alog?