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Editorial Team
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Asked: 2026-05-16T10:51:26+00:00

After resolving issues with RIA installation here , I’m still getting this following error.

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After resolving issues with RIA installation here, I’m still getting this following error. Not much special – I tried to create a new screen based off of data sources from an existing database in a full SQL 2005 instance

An error occurred while establishing a
connection to SQL Server instance
‘.\SQLEXPRESS’. 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: SQL Network
Interfaces, error: 26 – Error Locating
Server/Instance Specified)

I’ve tried to correct the connection string in the, I guess, autogen’d config file. Even though Visual Studio doesn’t seem to think that the file is overwritten on rebuild, the error continues to appear.

How can I use LightSwitch with full SQL 2005 rather than SQL Express?

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1 Answer

  1. Editorial Team

    It seems when working Locally, LightSwitch uses SQL Server Express. It puts it’s Membership, Roles, and other authentication information here. I don’t know any way to get around this locally, but when you go to “Publish” your project, you’re given the ability to use a different database/server. You can also use whatever server/database you’d like for your data sources as well.

    Hopefully, before V1, they’ll allow you to change that. But I haven’t found a way yet, without the config being overwritten constantly.

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