Dataflow Gen 1 cannot refresh - fails with Error Code 500

[kstiegler]

Is there a known service outage related to gen 1 dataflows? I have a critical dataflow that has been failing to refresh today (8/4/2025). I've seen some other related threads, but there are no noted service issues on the Fabric service status page (Microsoft Fabric service status).

Edit: For future reference, this dataflow had 3 queries, 2 to the same Dataverse source and 1 query that referenced another and appended the other. I could not get it to refresh with 3 separate queries, it would just always fail to refresh, so I figured out a way to do what I needed in one query and was able to get it to refresh that way. I still occasionally get the Error Code 500 when trying to open and edit the dataflow, but it's only intermittent now, at least.

Edit 2: My previous edit seems to be unrelated to the continued issues. While I was able to get the affected dataflow to refresh, the error code of 500 has been persistent this month (August 2025) and has frequently prevented me from refreshing or editing the dataflow. 

[v-tsaipranay]

Hi @kstiegler ,

Thank you for your response, and I apologize for any inconvenience caused.

As mentioned in my previous response, I recommend raising a support ticket so that the Microsoft team can review your logs and provide the most appropriate solution.

Please use the link below to submit your support ticket: Microsoft Fabric service status

Thank you.

[Aaron_Lawn]

I've been getting this same error repeatedly for the past week or two (August 2025)

It is intermittent.

Activity ID: 5ed5040c-0f0a-401e-9680-b4a37f0cfc76
Request ID: 75846b54-1127-553b-3287-64eb35a1c765
Correlation ID: ef1416bf-2e62-d23e-2b8e-c8440575c441
Status code: 500
Time: Mon Aug 11 2025 13:28:16 GMT+0100 (British Summer Time)
Service version: 13.0.26462.33
Client version: 2508.1.25357-train
Cluster URI: https://wabi-north-europe-i-primary-redirect.analysis.windows.net/

[v-tsaipranay]

Hi @kstiegler ,

I wanted to follow up on our previous suggestions. We would like to hear back from you to ensure we can assist you further.

Thank you.

[kstiegler]

The error code still happens quite frequently. Not constantly, but most of the time.

[v-tsaipranay]

Hi @kstiegler ,
Thank you for reaching out to the Microsoft fabric community forum and providing detailed context and diagnostic information.

Currently no reported service outages affecting Dataflow Gen1 on August 4, 2025, according to the Microsoft Fabric service status page. Please note that some intermittent or regional issues may not appear on the public dashboard, especially if they are brief or limited in scope.

We appreciate your approach in consolidating your queries, as this aligns with best practices for Gen1 dataflows, particularly when working with multiple references to the same Dataverse source. Complex dependencies between queries can sometimes cause refresh instability or backend issues, especially with query folding, so simplifying the logic as you have often leads to better reliability and performance.

Regarding the intermittent Error Code 500 when opening or editing the dataflow, this usually indicates a platform issue related to metadata or UI rendering. If the error persists, we recommend submitting a support ticket with the Activity ID, Correlation ID, timestamp, and cluster URI for further investigation.

We also suggest considering a migration to Dataflow Gen2 for improved stability, diagnostics, and performance.

Hope this helps. Please reach out for further assistance.

Thank you.

[MunyivaNgea]

Error: One or more upstream operations failed.. Request ID: 9735c003-0fa1-e57e-3dad-00b26e142cab.
Error: PipelineException: Container unexpectedly exited. Exit code: 0xC000012D. PID: 51344: MashupValueException. RootActivityId = cb440802-ac6d-4e46-8001-dce73b4520d5.Param1 = PipelineException: Container unexpectedly exited. Exit code: 0xC000012D. PID: 51344: MashupValueException Request ID: 9735c003-0fa1-e57e-3dad-00b26e142cab.
Error: The current operation was canceled because one or more operations failed.. Request ID: 9735c003-0fa1-e57e-3dad-00b26e142cab.

[kstiegler]

This is not the same error I'm receiving.

[MunyivaNgea]

I am experiencing the same 

Error: One or more upstream operations failed..
Error: PipelineException: Container unexpectedly exited. Exit code: 0xC000012D.

[GilbertQ]

Hi @kstiegler 

Could I please request that you post the full error code message so we can help debug it further?

[kstiegler]

This is the error I get when trying to open the dataflow:

Activity ID: ac69572e-2ead-4c4a-954f-402a5f16578a
Request ID: eb7c93f6-9b88-ee3d-1f99-3bfa0f4eed1f
Correlation ID: 2e0b3294-86be-3ae5-c202-f9d976c21906
Status code: 500
Time: Tue Aug 05 2025 08:21:54 GMT-0500 (Central Daylight Time)
Service version: 13.0.26369.35
Client version: 2507.3.25169-train
Cluster URI: https://wabi-us-north-central-b-redirect.analysis.windows.net/