Why orders submitted via Ninja Trader were cancelled or rejected?

Please see the Troubleshooting & Support section of the TWS API documentation for general troubleshooting suggestions and logging instructions.

Error messages sent by the TWS are handled by the EWrapper.error() callback function. When an error event occurs, it will be delivered to error(), and will contain the originating request/order ID (if applicable), a numeric error code and a brief description of the error. For further information on error handling and associated error codes, please consult the TWS API…

This error message will appear in the Order Preview window when submitting a short sale order after the order goes through a credit check and it is determined that IBKR will not be able to borrow shares by the trade settlement date.

Additional Information…

The message refers to who cancelled the order. As an example, Cancelled by System is a message you will see when one OCA leg of an order is canceled by the User then the IBKR system will cancel the other leg of the OCA Group. The message for the first leg will be displayed as User Cancelled as the user acted to cancel the order.  The other OCA leg message will show Cancelled by System as the IBKR system was active in cancelling that order. An Invalid Order means the order was either created incorrectly and when submitted the IBKR system would not accept the order. Or the Invalid Order was created in a manner the exchange would not accept or a change occurred like the contract expired so the exchange could no longer hold the order…

If you are having trouble downloading the IBKR Mobile/IBKR Global Trader App or it is not available on your app store, there are a variety of ways yo can access the IBKR platform:

How to update, download or re-download the IBKR Apps:…