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Is error due to a recent update? I've never seen the error before and now out of nowhere my backtest fails to build properly, and will attempt to build 10 times before crashing out with the error Failed to synchronize project. Cancelling backtest... .I've tried building manually, saving manually, clearing cookies, different browser, different IP address.
This is what my google console looks like:
Sash change event received for part: workbench.parts.panel
workbench.web.main.js:1910 Sending message to parent window {type: 'QC_CLOUD_TERMINAL_SIZE_UPDATE', detail: {…}}detail: {heightPixel: 426}type: "QC_CLOUD_TERMINAL_SIZE_UPDATE"[[Prototype]]: Object
workbench.web.main.js:1917 Received QC_VS_PROXY_MESSAGE in core from terminal {type: 'QC_VS_PROXY_MESSAGE', detail: {…}}detail: {vscodeCustomEventType: 'QC_CLOUD_TERMINAL_SIZE', heightPixel: 426}type: "QC_VS_PROXY_MESSAGE"[[Prototype]]: Object
workbench.web.main.js:1910 Cloud terminal size event received
Mia Alissi
To address the backtest synchronization error you're experiencing, here are some steps and insights based on the information you provided and the documentation:
System Check: Ensure your internet connection is stable. Though you have tried different ISPs, the issue might still be related to network inconsistency.
Recent Platform Updates: Check if there are any updates or announcements on QuantConnect forums about changes or known issues. QuantConnect may have rolled out recent updates affecting synchronization or build processes.
Project Review:
QCAlgorithm'son_datamethod and ensure it's correctly implemented without runtime or logic errors.Platform Sessions: Clear browser cache and cookies again, and try logging out of any other existing sessions on QuantConnect before accessing your account again.
Contact Support: Since you've tried different browsers and IPs with no resolution, reaching out to QuantConnect support could provide more comprehensive troubleshooting. Provide them with logs and the steps you've taken so far for better assistance.
Server Log Analysis:
Terminal and Error Logs:
These steps aim to resolve errors regarding synchronization and build issues when running a backtest on QuantConnect. If you continue to experience difficulties, coordinated troubleshooting with QuantConnect support is advised.
Sources: Debugging - QuantConnect.com, Getting Started - QuantConnect.com, Getting Started - QuantConnect.com, Debugging Tools - QuantConnect.com
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Carl Rossi
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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