Hello @alongkot.b,

The alert on the screenshot is strictly REDIPlus GUI and will not be detectable via API. So on the API integration side there is not that many options.

One approach can be to design proactively to prevent this- keep track of what you submit and do not submit duplicates.

Another approach, if you are not coding in Python, but either C# or VBA, you can use REDI monitoring functionality to assure the success of the orders that you submit. See REDI Monitoring tutorials and Monitoring on an Execution Management System in C# for more info on monitoring.

---

It's always better to ask separate question as separate question, this way it gets better visibility both from the developers community members and from the moderators of the developers forums.

You should be able to submit up to 3 orders per second, so what you describe should not apply. However, you will need to acknowledge the alert, such as the one you show on the screenshot, prior to being able to proceed with the next requests, so this can be the cause you could not submit anymore requests on the API side.