PipelineException: Collection was modified; enumeration operation may not execute

Hi rdnguyen,

Too little information is provided to determine the cause of the error. You can go to Refresh History to download detailed information.

Understanding and optimizing dataflows refresh - Power BI | Microsoft Docs

Or you can open a support ticket.

Best Regards

Community Support Team _ chenwu zhu

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

I expect to learn away to interprete the error via its exception message. The point is the message is also vaguely describe as much as you could see from my post. 😉

I would like to learn how you interprete that error message. I received 2 more today, nothing changed, just randomly received the error message.

Error: PipelineException: Collection was modified; enumeration operation may not execute. . RootActivityId = 15aae9f6-46da-42a8-b612-cb25e4631c3a.Param1 = PipelineException: Collection was modified; enumeration operation may not execute. Request ID: 4bcf7c8d-670d-42cf-8c6c-dba83bbf37d2.