Data / model
Processing error: Type Mismatch
Power BI dataset refresh error: what it means and how to fix it.
What this means
An M-script data-type mismatch during processing (often a stale Power BI Desktop version).
How to fix it
- Fix the M type conversion that is mismatched.
- Update Power BI Desktop and republish.
- Retest the refresh.
Frequently asked questions
- What does the "Processing error: Type Mismatch" error mean?
- An M-script data-type mismatch during processing (often a stale Power BI Desktop version).
- How do I fix it?
- Fix the M type conversion that is mismatched. Update Power BI Desktop and republish. Retest the refresh.
- Where does this Power BI refresh error appear?
- It appears in a Power BI semantic model's refresh history when a scheduled or on-demand refresh fails.
Related data / model errors
Catch this automatically
RefreshRadar monitors every Power BI dataset refresh and emails you when one fails, with the likely cause and the fix, so you are not hearing about a broken refresh from your stakeholders first.