Advance your Data & AI career with 50 days of live learning, dataviz contests, hands-on challenges, study groups & certifications and more!
Get registeredJoin us at FabCon Atlanta from March 16 - 20, 2026, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM. Register now.
I'm attempting to copy a large json file (2.4 GBs) that has been uploaded as a file to a data lakehouse. When I attempt to choose this file in the "Connect to a data source" menu of the pipeline copy data activity it tries to show a preview of the json. I assume the file is too large to show a preview so it eventually errors out with a "Failed to load" message and I'm unable to complete the copy data wizard.
Are you able to provide us with your json file ? And can you log a support ticket for this issue, please attach the request id along with the ticket.
Join the Fabric FabCon Global Hackathon—running virtually through Nov 3. Open to all skill levels. $10,000 in prizes!
Check out the September 2025 Fabric update to learn about new features.