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Every backtest I run completes but fails to show results, with “No data available”. Hitting the button to share the backtest shows “Processing backtest, please wait…” Closing the backtest and attempting to load a previously completed backtest shows a blank screen with "Loading..."
This has only been happening this morning. It fails for code that previously worked. I created a new project from the default template just to be sure that it's not a problem with my code, and that also fails in the same way. I think it's clear that there is a problem either with the platform or with my backtest node.
Is anyone else experiencing this?
Mia Alissi
To assist Frank, consider taking the following steps:
Platform Status Check: Visit QuantConnect's status page to determine if there are ongoing outages or maintenance that might impact backtesting. It might be a temporary platform issue.
Review Community Communication: Check QuantConnect community forums or announcements for any note on known issues. These platforms may contain updates or insights from other users experiencing similar difficulties.
Clear Browser Cache and Cookies: Sometimes web-based platform behavior issues are due to caches or cookies. Clear your browser's cache or try a different browser to see if the problem persists.
Re-authenticate: Log out of QuantConnect, clear cookies, and then log back in. This can sometimes resolve session-related issues.
Ensure Valid Code and Data: Although a default template has been tested, double-check that the backtest date range has available data. The "No data available" message may indicate an issue with the selected asset class, resolution, or time period not having data.
Stable Internet Connection: Verify that your internet connection is stable. An unstable connection could result in failed data loading.
Contact QuantConnect Support: If none of the above solutions mitigates the issue, reach out to QuantConnect support. Provide detailed information about the issue, especially when it started and specific actions taken that might have triggered it.
Monitor Forums and Community Discussions: Stay engaged in the QuantConnect community forums, as others might have experienced similar issues and shared solutions.
Following these steps systematically should help diagnose and, ideally, resolve the problem. If it's a platform-related issue, it's likely to be resolved as QuantConnect addresses it.
Sources: Getting Started - QuantConnect.com, Getting Started - QuantConnect.com, Results - QuantConnect.com
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Apex Panther
Same, seems like an issue from Quantconnect → Downtime. → Check Status Page
Frank Pape
I saw that, but the backtesting status says “Down for 6 minutes, now operational”. But this has been broken for at least a couple hours, and new backtests still don't work.
Apex Panther
Indeed. I'm currently running it locally because of that.
Frank Pape
Hopefully this will get resolved soon! At any rate, I'm glad it's not just me.
Jon Quant
Same issue with me too. Getting this error when running backtests, “Failed to synchronize project. Cancelling backtest...”.
David E
mine isnt working either, same kind of issues.
Gary Lynn
My backtests are not throwing errors, but no trades are generated when running a project that I know should generate trades. I noticed the LEAN ENGINE version is from yesterday, so perhaps there was a breaking change with this version.
Frederick Guntermann
I have the same Problem.
Andile Ma-Ash Msani
I noticed that there was an update to the Lean Engine last night to Master v16991, that could be the issue.
Gary Lynn
Seems to be working now.
Jon Quant
Yes it is.
Frank Pape
The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by QuantConnect. In addition, the material offers no opinion with respect to the suitability of any security or specific investment. QuantConnect makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances. All investments involve risk, including loss of principal. You should consult with an investment professional before making any investment decisions.
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