Dataflow Gen2 (CI/CD) Non-deterministic failure - Unknown evaluation error code: 104100

Hi royclack ,

The error, 104100 is a generic Power BI Dataflow error that indicates an "Unknown evaluation error."
This generally means the Power Query (M) engine encountered something during runtime that prevented evaluation—but it couldn’t map it to a specific root cause. These errors often disappear on manual refresh, making them hard to trace.

You can try to troubleshoot this by following these steps-

1. Schedule dataflows to run at different times to avoid capacity issues.
2. Use the “View Native Query” tool in Power Query Editor to ensure folding is consistent and valid. Test all data sources independently for timeout.
3. After deploying via CI/CD, do a one-time manual refresh before scheduling it.

If you are still not able to resolve the issue, consider raising a support ticket.
To raise a support ticket for Fabric and Power BI, kindly follow the steps outlined in the following guide:
How to create a Fabric and Power BI Support ticket - Power BI | Microsoft Learn

If this post helps, please give us Kudos and consider marking it Accept as solution to assist other members in finding it more easily.
Thank You!