Timeout expired when refreshing

Hi Anonymous ,

A timeout usually means that it's taking too long to refresh. The best idea is to check the performance of the source. There is no way to guarantee refresh without failing. Since you have changed the timeout to max in advanced editor, there is still a refresh limit on capacity:

Scheduled refresh for imported datasets timeout after two hours. This timeout is increased to five hours for datasets in Premium workspaces. 

You can pay attention to the following limitations and check why the refresh failed.

1, When use Import model, if the memory is insufficient, the refresh will be slow.

2, The maximum size for datasets imported into the Power BI service is 1 GB.

3, Overly complex data model is a common cause of slow refresh, such as using complex DAX function, using too many tiles or using RLS.

4, Runing queries for a long time can cause slow refresh.

5, Check the network to see if there is a network problem, which causes the network delayed or the network connection disconnected.

6, Check whether there is a problem with the gateway. By checking the gateway log or additional log, and looking at the outside of Fiddle, whether there is a firewall problem, whether the gateway is up to date, password changes or credentials expire, the refresh will fail.

7, Check the refresh history to find out whether the reason is the problem of refreshing.

Please refer to the following documents.

Troubleshooting refresh scenarios - Power BI | Microsoft Docs

Troubleshooting refresh unsupported data sources - Power BI | Microsoft Docs

Best Regards,
Community Support Team _ xiaosun

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