TWS error 200: contract not found or ambiguous

Quick answer

Error 200 means IBKR could not resolve the requested product to one contract. Compare the full contract description, including exchange, currency, and expiry where needed. A chart ticker alone may not identify the product you want to trade.

Educational software guidance. Trading involves risk. Read the financial and information disclaimers.

Step by step

1 Find the product in a TWS watchlist without creating an order.
2 Right-click it and open Financial Instrument Info → Description.
3 Compare its security type, currency, exchange, and contract month with the app mapping. For options, also compare strike and call or put.
4 Correct the mapping in the app that creates the request. Use the actual contract, not a continuous chart symbol.
5 Request the contract again and confirm its description before any order test.

A practical example

Suppose a stock ticker exists in two markets. You want the listing priced in one currency, but the app sends only the short name. TWS may ask for more detail. Open the stock you want in TWS and read its full Description. Compare the listing and currency with the app. A lookup that returns a different stock is not a successful fix, even if the error goes away.

Illustrative scenario, not a record of a trade placed during this review.

Screen reference

TWS stock Description showing SMART route, NASDAQ primary exchange, currency, contract ID, minimum tick and frozen data status — This stock is an example of the fields to compare. SMART routing and Primary Exchange are separate fields. The observed feed is Frozen and the market is closed; this is not a live-price or trading recommendation. Captured in TWS paper mode on 3 October 2026. Open the image for full size.

TWS futures Description showing contract month, expiry, multiplier, exchange, tick size and trading schedule — This example future shows where to read the month, multiplier and tick size. Use your own intended contract; the pictured contract is not a recommendation. The captured market is closed and data is Frozen. Captured in TWS paper mode on 3 October 2026. Open the image for full size.

How to confirm the result The request should return exactly the intended product, with no ambiguity message.

Mistake to avoid

A similarly named micro future, larger future, or different stock listing is not an acceptable substitute.

Common questions

Can two stocks share a ticker?

Yes. The listing exchange and currency help identify the intended one.

Does reconnecting fix a bad contract?

A reconnect does not correct the fields in the request.

TWS error 201: read the order rejection reason TWS error 202: why was the order cancelled? TWS error 110: price does not match the tick size Find an instrument’s full contract details in TWS

Financial and information disclaimers

Financial disclaimer

These guides explain software. They are for education, not financial, investment, tax, or legal advice. No example is a suggestion to buy or sell a product or use a trading strategy. Trading can lose money, including all funds you put at risk. With margin, futures, short sales, or some options, losses can exceed your starting funds. Automation can fail, send duplicate orders, or act late. Stops do not guarantee a fill or a price. Review your orders and positions, and seek advice from a qualified professional for your own needs. Paper trades, examples, and past results do not predict live results or promise a profit.

Information disclaimer

This is general help based on the sources and check date shown on the page. Screens, settings, fees, data access, and product support can change or differ by app version, account, country, and broker. The content may contain errors or become out of date; accuracy, completeness, and continuous service are not guaranteed. Check current broker and app instructions before acting. Screenshots show where controls are; they do not prove that an order test passed. This guide does not replace broker terms or risk notices. References to IBKR and TradingView identify their products and do not imply their endorsement of this guide.