Forum Discussion
Error Loading Data from Dataflow Gen2 to Microsoft Fabric Data Warehouse
Hi lucasgalde ,
Please chcek if these two scenarios are inadvertently causing the error:The error message suggests a data type mismatch between your pre and post refresh data. For example, a column that previously contained datetime values is now containing only date values which may inadvertently cause the error.
Another possible reason for the issue, as you mentioned not encountering the error in Azure SQL Database and Lakehouse, could be that the data includes a datatype that is unsupported by Fabric Warehouse.
Document to check what data types are not supported by Warehouse:
Data types - Microsoft Fabric | Microsoft Learn
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Thanks and Regards
Hello lucasgalde
Dataflow Gen2 automatically uses a hidden staging Lakehouse, even when the final destination is a Data Warehouse. If this Lakehouse’s SQL analytics endpoint is misconfigured, errors occur during data transfer
try these
Delete the existing Lakehouse (or Data Warehouse) and republish the Dataflow Gen2 to force regeneration of metadata
try Disabling staging in Dataflow Gen2 settings
I have discussed this is details here
Hi nilendraFabric ,
Thank you for your response!
In my case, my Gen2 is connected to a Fabric Data Warehouse, where enabling the staging option is mandatory. Because of this, I am unable to disable it to test this solution.
I explored a few alternatives:
- Changing the data destination to Azure SQL Database instead of the Warehouse, but this significantly increased the loading time.
- Creating a Lakehouse and loading the data there.
- Creating a new Warehouse from scratch and recreating the Gen2 Dataflow, but I still encountered the same error.
Best regards,