I've been trying to work with a Firebird Database in the 4.2 Designer. FirebirdSql.Data.FirebirdClient is installed in the GAC, but I still get the error:

I receive the following message:

**Exception information.

LLBLGen Pro version: v4.2. Build: November 29th, 2016

Exception details:

Message: Unable to find the requested .Net Framework Data Provider. It may not be installed. Source: System.Data Stack trace: at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName) at SD.LLBLGen.Pro.DBDriverCore.DBDriverBase.GetDbProviderFactory() at SD.LLBLGen.Pro.DBDriverCore.DBDriverBase.CreateConnection() at SD.LLBLGen.Pro.Gui.Controls.WizardPages.MetaDataRetrievalWizard_Step_ConnectionData.TestConnectionData(Boolean showSuccess)

Inner exception: <null>**

I've verified that the Firebird Provider is installed in the GAC. I'm not sure what else to try to fix the issue. I've tried modifying the Config File as well: LLBLGenPro.exe.config

Hi SJSMWF,

How did you modify the LLBLGenPro.exe.config file?

If you install the driver via NuGet, it is only available in your project, you can't use it from Visual Studio itself or other applications, as the NuGet package doesn't install itself on your machine (and so doesn't modify the machine.config).

You will need to install the driver with the installers you can download from Firebird ADO.NET Data Provider additional downloads. Otherwise you should put the DBProviderFactory yourself into the machine.config.

If the problem persists, please give us more information about your setup (Firebird ADO.Net Data Provider version, Operating System version, x86 or x64?, etc).