Hi tonyomez - When working with dataflows in Power BI, there are several factors that might cause the updated data not to reflect as expected.
1. Cache Issue
Cause: Power BI Service caches the dataflow results for performance reasons, and sometimes these caches are not cleared after a refresh.
Solution:
Manually clear the cache:
Go to Power BI Service.
Open the dataflow in question.
In the Settings, turn off the enhanced compute engine (if enabled) and refresh the dataflow again.
Once refreshed, turn the enhanced compute engine back on.
Alternatively, use a manual browser cache clear or try viewing the dataflow in an incognito browser.
2. Refresh Order of Dataflows
Cause: If your dataflow is dependent on another linked dataflow, the source dataflow might not finish refreshing before the dependent dataflow starts.
Solution:
Ensure that the source dataflow refreshes completely before the linked dataflow starts its refresh.
You can sequence refreshes using a Power Automate flow or by manually refreshing each dataflow in the correct order.
3. Dataflow Refresh Failure
Cause: Even if the dataflow appears to refresh, there might be errors or partial refreshes due to connection issues or timeouts.
Solution:
Check the Refresh History for the dataflow in Power BI Service:
Open Power BI Service.
Navigate to the Workspace containing the dataflow.
Click on the dataflow's More Options (...) and select Settings.
Look for the Refresh History and check for any errors.
If errors exist, resolve them based on the details provided (e.g., connectivity, authentication, or query issues).
4. Enhanced Compute Engine Delays
Cause: When using the Enhanced Compute Engine, there might be a delay in making the data available for downstream use after a refresh.
Solution:
Disable the Enhanced Compute Engine temporarily to test if this resolves the issue.
Alternatively, wait for a few minutes after the dataflow refresh completes before checking for updates.
5. Data Preview vs. Actual Data
Cause: The Data Preview in Power BI might show updated data, but the actual dataflow output might not be refreshed if the table view in the dataflow editor wasn't saved correctly or fully processed.
Solution:
After editing the dataflow, ensure that you Save & Close the dataflow editor and refresh the dataflow again.
6. Issues with Linked Dataflows
Cause: Linked dataflows sometimes face latency issues or incorrect mapping between tables.
Solution:
Verify that the linked dataflow references the correct table and column names.
Test the linked dataflow by refreshing it directly and checking its output.
7. Power BI Desktop View vs. Service View
Cause: If you’re connecting Power BI Desktop to the dataflow, it might not immediately show the updated data due to cached data in the desktop file.
Solution:
In Power BI Desktop:
Go to Transform Data (Power Query Editor).
Right-click the query connected to the dataflow and select Refresh Preview.
Save and refresh the report in Power BI Desktop.
Publish the updated report to Power BI Service.
8. Data Permissions Issue
Cause: If permissions for the dataflow or its linked source have changed, it might prevent updates from propagating correctly.
Solution:
Verify the permissions for the user account running the refresh for both the source and linked dataflows.
Reauthenticate the dataflow connection if necessary.
