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Error to retrieve tables from SQL Server on premise

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Posted on by arisprabhawa Microsoft Employee

Hi all,

I have configured SQL Server On premise using SQL Server Express 2014. I can connect it succesfully through SQL Server Management Studio.

But when I tried to connect to Powerapps, it failes.

Here what I did:

1. Install Gateway (success)

2. Add SQL server connection on premise (success)

It successfully detect my database (TestExpense), but failed to read dataset, as it read "default". When I clicked the "Default" dataset, it provide errors "The table didn't load correctly. Please try again."

Here is the full errors.

Invalid Mashup Expression using supplied values.
inner exception: Microsoft SQL: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

Please help

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Building Power Apps

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arisprabhawa Microsoft Employee on at

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I also follow up to this thread:
https://powerusers.microsoft.com/t5/PowerApps-Forum/Connect-to-SQL-server/m-p/3516/highlight/true#M1771

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v-yamao-msft on at

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Hi Arisprabhawa,

According to the error message, it seems that there is something wrong with your SQL Server On-premise. Please check the following things.

1. Please make sure your database engine is configured to accept remote connections.
2. Please make sure that you create an exception on the firewall for the SQL Server instance and port you are using.
3. Please check if your SQL server services is up and running properly.
4. Please make sure that you enable TCP/IP in SQL Server Configuration

This article could be a reference for you:
https://www.mssqltips.com/sqlservertip/2340/resolving-could-not-open-a-connection-to-sql-server-errors/

Best regards,
Mabel Mao

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