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Interactive Brokers API error code

Interactive Brokers API error: null time in force is not supported for this order

The error, as text you can copy

null time in force is not supported for this order
Kind
API error code
HTTP status
200
API
Interactive Brokers

What does null time in force is not supported for this order mean on the Interactive Brokers API?

Web API status 200 OK, with the error message "null time in force is not supported for this order" (the vendor's wording). Interactive Brokers lists it on its order error details page. The vendor's context: no tif value was given, or the value was invalid.

Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders.

Independent and unofficialinteractivebrokers.comchecked

How do I fix null time in force is not supported for this order?

Send a valid tif value on the order.