Power BI Service Refresh Issue – COM Error: mscorlib, Task Was Canceled

[Jawahar1998]

Subject:
Power BI Service Refresh Issue – COM Error: mscorlib, Task Was Canceled

Body:
Request ID: 0be60ed7-f7d2-da0a-139d
Time: 2025-11-04 11:00:20Z

Issue Summary:
The dataset refresh works without issues in Power BI Desktop but fails in Power BI Service with the error:
COM error: mscorlib, A task was canceled.

Data Source:
- Dynamics 365
- SharePoint List

Details:
#1 Start: 4:15:08 pm End: 4:16:54 pm Duration: 1m 45s Status: Failed
#2 Start: 4:17:59 pm End: 4:19:41 pm Duration: 1m 42s Status: Failed
#3 Start: 4:21:41 pm End: 4:23:23 pm Duration: 1m 42s Status: Failed
#4 Start: 4:28:37 pm End: 4:30:20 pm Duration: 1m 42s Status: Failed

Steps Tried:
- Verified credentials for Dynamics 365 and SharePoint
- Refresh works fine in Desktop
- No gateway issues observed

Request:
Please advise on possible causes or solutions for this error in Power BI Service. Is this related to timeout, gateway configuration, or service limitations?

[v-saisrao-msft]

Hi @Jawahar1998,

Have you had a chance to review the solution we shared earlier? If the issue persists, feel free to reply so we can help further.

Thank you.

[Jawahar1998]

I have tried following your instruction but unfortunately doesn't help me to fix. i have tried to edit privacy levels and reduce the transformation steps etc. 

[v-saisrao-msft · Accepted solution]

Hi @Jawahar1998,

Since the issue persists after verifying configuration and model optimizations, I’d recommend raising a support ticket through the link below so that backend engineers assist to solve the issue:

Create a Fabric and Power BI Support Ticket - Power BI | Microsoft Learn

Thank you.

[v-saisrao-msft]

Hi @Jawahar1998,

Please refer to the following links which address your issue and outline the troubleshooting steps:

• Solved: Re: Issue with report refresh - Microsoft Fabric Community

• Troubleshoot refresh scenarios - Power BI | Microsoft Learn

These resources explain the possible causes (such as OAuth token expiration or service timeout) and provide steps to resolve the issue.

Thank you.