← All Power BI refresh errors
Timeout
The connection either timed out or was lost
Error code: connection-timed-out-or-lost
Power BI dataset refresh error — what it means and how to fix it.
What this means
The Analysis Services / semantic-model connector lost the connection (transient network, or a complex M outer-join stalls).
How to fix it
- Retry the refresh.
- Table.Buffer the outer-join table to stabilize the join.
- Simplify the joins.
Catch this automatically
RefreshRadar monitors every Power BI dataset refresh and alerts you the moment one fails — with the likely cause and the fix — so you never hear about a broken refresh from your stakeholders first.
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