QuantConnect Lean Improves Live Read Error Handling

QuantConnect Lean engine has improved its error handling for data reads during live trading. This update maintains an empty error list during live reads and add

QuantConnect Lean — C#/Python Backtesting & Live Engine · Release 18139 · 2026-09-28

QuantConnect Lean engine has improved its error handling for data reads during live trading. This update maintains an empty error list during live reads and adds functionality to stop deployments under specific conditions. Live trading stability and error management have been enhanced.

weltiq perspective: weltiq users can now prevent unexpected interruptions caused by data errors during live automated execution, enabling more stable operations.

Release Notes Excerpt

Keep an empty errors list on live reads and stop the deployment when …

Source: https://github.com/QuantConnect/Lean/releases/tag/18139