Microsoft Access Canít Open the Database File

Problem

You are using Microsoft Access and receive an error in the event viewer saying:

ďThe Microsoft Jet database engine cannot open the file 'C:\MyApp\YourDatabaseName.mdb'. It is already opened exclusively by another user, or you need permission to view its data.Ē

Solution

Review this Microsoft Knowledge Base article:

http://support.microsoft.com/default.aspx?scid=kb;en-us;316675

This article discusses one possible cause:† The ASP.NET worker process runs under the default ASPNET account. If you do not enable impersonation for an application, all of the threads that run the requests for that application run under the process account.

This article suggests several solutions:

Please also take special note of the following:

See Also

Application Runs But No Data is Displayed