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Hello:
When you refresh data from Power BI Desktop (Importing) most of the time it times out.
If you go to PBI Porperties--- Data Load --- look for "Parallel loading of Tables". It is enable by default.
When you do refresh, half way thru you will encounter this error as shown below.
After disabling, i ran refresh for data and it completed suucessfully. So there is bug\flaws for "Parallel loading of Tables" when it is enabled.
There are many customers taht are IMPORTING Data in Power BI.
Microsoft need to FIX this ASAP.
Thanks
Jayesh DAVE
ERROR:-
OLE DB or ODBC error: [DataSource.Error] Oracle: ORA-03113: end-of-file on communication channel
Process ID: 20840758
Session ID: 421 Serial number: 53069.

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