Intermittent connection error when rendering paginated report in Power BI Service

Hi sid_11,

Thanks for reaching fabric community, will happy to assist.

As you are saying this report loading and working as accepted after multiple attempts so it seems the issue is with the backend service instability, capacity pressure, semantic model load, or temporary connection issues between the paginated report renderer and the semantic model.

may be the Analysis services are getting oocupied else where also when your are running the report. There was not any specific fix we can apply to resolve the issue. Please review below things in mind to reproduce the issue.

Things to check:

• Check the Power BI support/status page for any regional service incidents.
• If the workspace is on Premium/Fabric capacity, review the Capacity Metrics App around the failure time.
• Look for high CPU, memory pressure, query wait time, throttling, or overloaded semantic models.
• Check whether the semantic model is being refreshed when the paginated report fails.
• If the report uses a Power BI semantic model as the source, review slow DAX queries or large parameter-driven queries.
• If there is an on-premises data gateway involved, check gateway logs and gateway availability.

Best practices to reduce this:

• Keep paginated report queries as targeted as possible.
• Use required parameters to reduce the amount of data returned.
• Avoid loading very large tablix outputs by default.
• Optimize the underlying semantic model and DAX measures.
• Avoid opening heavy paginated reports during dataset refresh windows.
• Consider scheduling subscriptions/exports during low-load periods (If report subscriptions are used).
• Monitor capacity usage and scale up if the capacity is consistently under pressure.

Still, you have an issue you can raise the microsoft support ticket with the Activity ID. They can assisit you as soon as possible.

Please consider this as an accpeted solution or give it some kudos.

Thanks

Hello! Along with what Lodha_Jaydeep suggested you can check if something in your org is affecting it on the browser side as well.  This has happend in our environment and specifically with paginated reports.  To troublshoot, turn on developer mode in your browser and check for any blocks within the browser itself.  

You can refer to this thread as it had to do with CORS detection policy: Solved: Re: Paginated Reports not running on Service - Microsoft Fabric Community

This may or may not be what is affecting it but at least wanted to note for you.