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Editorial Team
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Asked: 2026-05-16T20:51:20+00:00

I am working on a SQL Compact demo app, and one of the things

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I am working on a SQL Compact demo app, and one of the things I my setup project does is copy an SDF file to the user’s c:\ProgramData folder. However, when the app is run on the user’s machine, I get the following error:

System.Data.EntityException: The underlying provider failed on Open. —> System.Data.SqlServerCeException: Access to the database file is not allowed. [File name = c:\ProgramData\Foresight Systems\SQL Compact Demo\LocalData.sdf]

I am puzzled as to what’s causing this error. Isn’t c:\ProgramData the preferred location for this sort of file? What do I need to do in my setup project to get this to work? Thanks for your help.

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1 Answer

  1. Editorial Team

    A few things to check perhaps(?):

    • the .sdf has a file attribute of readonly
    • is the application being run as administrator or UAC access being granted?
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